1ac27a0ecSDave Kleikamp /* 2617ba13bSMingming Cao * linux/fs/ext4/super.c 3ac27a0ecSDave Kleikamp * 4ac27a0ecSDave Kleikamp * Copyright (C) 1992, 1993, 1994, 1995 5ac27a0ecSDave Kleikamp * Remy Card (card@masi.ibp.fr) 6ac27a0ecSDave Kleikamp * Laboratoire MASI - Institut Blaise Pascal 7ac27a0ecSDave Kleikamp * Universite Pierre et Marie Curie (Paris VI) 8ac27a0ecSDave Kleikamp * 9ac27a0ecSDave Kleikamp * from 10ac27a0ecSDave Kleikamp * 11ac27a0ecSDave Kleikamp * linux/fs/minix/inode.c 12ac27a0ecSDave Kleikamp * 13ac27a0ecSDave Kleikamp * Copyright (C) 1991, 1992 Linus Torvalds 14ac27a0ecSDave Kleikamp * 15ac27a0ecSDave Kleikamp * Big-endian to little-endian byte-swapping/bitmaps by 16ac27a0ecSDave Kleikamp * David S. Miller (davem@caip.rutgers.edu), 1995 17ac27a0ecSDave Kleikamp */ 18ac27a0ecSDave Kleikamp 19ac27a0ecSDave Kleikamp #include <linux/module.h> 20ac27a0ecSDave Kleikamp #include <linux/string.h> 21ac27a0ecSDave Kleikamp #include <linux/fs.h> 22ac27a0ecSDave Kleikamp #include <linux/time.h> 23c5ca7c76STheodore Ts'o #include <linux/vmalloc.h> 24dab291afSMingming Cao #include <linux/jbd2.h> 25ac27a0ecSDave Kleikamp #include <linux/slab.h> 26ac27a0ecSDave Kleikamp #include <linux/init.h> 27ac27a0ecSDave Kleikamp #include <linux/blkdev.h> 28ac27a0ecSDave Kleikamp #include <linux/parser.h> 29ac27a0ecSDave Kleikamp #include <linux/buffer_head.h> 30a5694255SChristoph Hellwig #include <linux/exportfs.h> 31ac27a0ecSDave Kleikamp #include <linux/vfs.h> 32ac27a0ecSDave Kleikamp #include <linux/random.h> 33ac27a0ecSDave Kleikamp #include <linux/mount.h> 34ac27a0ecSDave Kleikamp #include <linux/namei.h> 35ac27a0ecSDave Kleikamp #include <linux/quotaops.h> 36ac27a0ecSDave Kleikamp #include <linux/seq_file.h> 379f6200bbSTheodore Ts'o #include <linux/proc_fs.h> 383197ebdbSTheodore Ts'o #include <linux/ctype.h> 391330593eSVignesh Babu #include <linux/log2.h> 40717d50e4SAndreas Dilger #include <linux/crc16.h> 417abc52c2SDan Magenheimer #include <linux/cleancache.h> 42ac27a0ecSDave Kleikamp #include <asm/uaccess.h> 43ac27a0ecSDave Kleikamp 44bfff6873SLukas Czerner #include <linux/kthread.h> 45bfff6873SLukas Czerner #include <linux/freezer.h> 46bfff6873SLukas Czerner 473dcf5451SChristoph Hellwig #include "ext4.h" 486f91bc5fSEric Gouriou #include "ext4_extents.h" 493dcf5451SChristoph Hellwig #include "ext4_jbd2.h" 50ac27a0ecSDave Kleikamp #include "xattr.h" 51ac27a0ecSDave Kleikamp #include "acl.h" 523661d286STheodore Ts'o #include "mballoc.h" 53ac27a0ecSDave Kleikamp 549bffad1eSTheodore Ts'o #define CREATE_TRACE_POINTS 559bffad1eSTheodore Ts'o #include <trace/events/ext4.h> 569bffad1eSTheodore Ts'o 571f109d5aSTheodore Ts'o static struct proc_dir_entry *ext4_proc_root; 583197ebdbSTheodore Ts'o static struct kset *ext4_kset; 590b75a840SLukas Czerner static struct ext4_lazy_init *ext4_li_info; 600b75a840SLukas Czerner static struct mutex ext4_li_mtx; 610b75a840SLukas Czerner static struct ext4_features *ext4_feat; 629f6200bbSTheodore Ts'o 63617ba13bSMingming Cao static int ext4_load_journal(struct super_block *, struct ext4_super_block *, 64ac27a0ecSDave Kleikamp unsigned long journal_devnum); 65e2d67052STheodore Ts'o static int ext4_commit_super(struct super_block *sb, int sync); 66617ba13bSMingming Cao static void ext4_mark_recovery_complete(struct super_block *sb, 67617ba13bSMingming Cao struct ext4_super_block *es); 68617ba13bSMingming Cao static void ext4_clear_journal_err(struct super_block *sb, 69617ba13bSMingming Cao struct ext4_super_block *es); 70617ba13bSMingming Cao static int ext4_sync_fs(struct super_block *sb, int wait); 71617ba13bSMingming Cao static const char *ext4_decode_error(struct super_block *sb, int errno, 72ac27a0ecSDave Kleikamp char nbuf[16]); 73617ba13bSMingming Cao static int ext4_remount(struct super_block *sb, int *flags, char *data); 74617ba13bSMingming Cao static int ext4_statfs(struct dentry *dentry, struct kstatfs *buf); 75c4be0c1dSTakashi Sato static int ext4_unfreeze(struct super_block *sb); 76617ba13bSMingming Cao static void ext4_write_super(struct super_block *sb); 77c4be0c1dSTakashi Sato static int ext4_freeze(struct super_block *sb); 78152a0836SAl Viro static struct dentry *ext4_mount(struct file_system_type *fs_type, int flags, 79152a0836SAl Viro const char *dev_name, void *data); 802035e776STheodore Ts'o static inline int ext2_feature_set_ok(struct super_block *sb); 812035e776STheodore Ts'o static inline int ext3_feature_set_ok(struct super_block *sb); 82d39195c3SAmir Goldstein static int ext4_feature_set_ok(struct super_block *sb, int readonly); 83bfff6873SLukas Czerner static void ext4_destroy_lazyinit_thread(void); 84bfff6873SLukas Czerner static void ext4_unregister_li_request(struct super_block *sb); 858f1f7453SEric Sandeen static void ext4_clear_request_list(void); 86ac27a0ecSDave Kleikamp 872035e776STheodore Ts'o #if !defined(CONFIG_EXT2_FS) && !defined(CONFIG_EXT2_FS_MODULE) && defined(CONFIG_EXT4_USE_FOR_EXT23) 882035e776STheodore Ts'o static struct file_system_type ext2_fs_type = { 892035e776STheodore Ts'o .owner = THIS_MODULE, 902035e776STheodore Ts'o .name = "ext2", 912035e776STheodore Ts'o .mount = ext4_mount, 922035e776STheodore Ts'o .kill_sb = kill_block_super, 932035e776STheodore Ts'o .fs_flags = FS_REQUIRES_DEV, 942035e776STheodore Ts'o }; 952035e776STheodore Ts'o #define IS_EXT2_SB(sb) ((sb)->s_bdev->bd_holder == &ext2_fs_type) 962035e776STheodore Ts'o #else 972035e776STheodore Ts'o #define IS_EXT2_SB(sb) (0) 982035e776STheodore Ts'o #endif 992035e776STheodore Ts'o 1002035e776STheodore Ts'o 101ba69f9abSJan Kara #if !defined(CONFIG_EXT3_FS) && !defined(CONFIG_EXT3_FS_MODULE) && defined(CONFIG_EXT4_USE_FOR_EXT23) 102ba69f9abSJan Kara static struct file_system_type ext3_fs_type = { 103ba69f9abSJan Kara .owner = THIS_MODULE, 104ba69f9abSJan Kara .name = "ext3", 105152a0836SAl Viro .mount = ext4_mount, 106ba69f9abSJan Kara .kill_sb = kill_block_super, 107ba69f9abSJan Kara .fs_flags = FS_REQUIRES_DEV, 108ba69f9abSJan Kara }; 109ba69f9abSJan Kara #define IS_EXT3_SB(sb) ((sb)->s_bdev->bd_holder == &ext3_fs_type) 110ba69f9abSJan Kara #else 111ba69f9abSJan Kara #define IS_EXT3_SB(sb) (0) 112ba69f9abSJan Kara #endif 113bd81d8eeSLaurent Vivier 1149933fc0aSTheodore Ts'o void *ext4_kvmalloc(size_t size, gfp_t flags) 1159933fc0aSTheodore Ts'o { 1169933fc0aSTheodore Ts'o void *ret; 1179933fc0aSTheodore Ts'o 1189933fc0aSTheodore Ts'o ret = kmalloc(size, flags); 1199933fc0aSTheodore Ts'o if (!ret) 1209933fc0aSTheodore Ts'o ret = __vmalloc(size, flags, PAGE_KERNEL); 1219933fc0aSTheodore Ts'o return ret; 1229933fc0aSTheodore Ts'o } 1239933fc0aSTheodore Ts'o 1249933fc0aSTheodore Ts'o void *ext4_kvzalloc(size_t size, gfp_t flags) 1259933fc0aSTheodore Ts'o { 1269933fc0aSTheodore Ts'o void *ret; 1279933fc0aSTheodore Ts'o 128db9481c0SMathias Krause ret = kzalloc(size, flags); 1299933fc0aSTheodore Ts'o if (!ret) 1309933fc0aSTheodore Ts'o ret = __vmalloc(size, flags | __GFP_ZERO, PAGE_KERNEL); 1319933fc0aSTheodore Ts'o return ret; 1329933fc0aSTheodore Ts'o } 1339933fc0aSTheodore Ts'o 1349933fc0aSTheodore Ts'o void ext4_kvfree(void *ptr) 1359933fc0aSTheodore Ts'o { 1369933fc0aSTheodore Ts'o if (is_vmalloc_addr(ptr)) 1379933fc0aSTheodore Ts'o vfree(ptr); 1389933fc0aSTheodore Ts'o else 1399933fc0aSTheodore Ts'o kfree(ptr); 1409933fc0aSTheodore Ts'o 1419933fc0aSTheodore Ts'o } 1429933fc0aSTheodore Ts'o 1438fadc143SAlexandre Ratchov ext4_fsblk_t ext4_block_bitmap(struct super_block *sb, 1448fadc143SAlexandre Ratchov struct ext4_group_desc *bg) 145bd81d8eeSLaurent Vivier { 1463a14589cSAneesh Kumar K.V return le32_to_cpu(bg->bg_block_bitmap_lo) | 1478fadc143SAlexandre Ratchov (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 1488fadc143SAlexandre Ratchov (ext4_fsblk_t)le32_to_cpu(bg->bg_block_bitmap_hi) << 32 : 0); 149bd81d8eeSLaurent Vivier } 150bd81d8eeSLaurent Vivier 1518fadc143SAlexandre Ratchov ext4_fsblk_t ext4_inode_bitmap(struct super_block *sb, 1528fadc143SAlexandre Ratchov struct ext4_group_desc *bg) 153bd81d8eeSLaurent Vivier { 1545272f837SAneesh Kumar K.V return le32_to_cpu(bg->bg_inode_bitmap_lo) | 1558fadc143SAlexandre Ratchov (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 1568fadc143SAlexandre Ratchov (ext4_fsblk_t)le32_to_cpu(bg->bg_inode_bitmap_hi) << 32 : 0); 157bd81d8eeSLaurent Vivier } 158bd81d8eeSLaurent Vivier 1598fadc143SAlexandre Ratchov ext4_fsblk_t ext4_inode_table(struct super_block *sb, 1608fadc143SAlexandre Ratchov struct ext4_group_desc *bg) 161bd81d8eeSLaurent Vivier { 1625272f837SAneesh Kumar K.V return le32_to_cpu(bg->bg_inode_table_lo) | 1638fadc143SAlexandre Ratchov (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 1648fadc143SAlexandre Ratchov (ext4_fsblk_t)le32_to_cpu(bg->bg_inode_table_hi) << 32 : 0); 165bd81d8eeSLaurent Vivier } 166bd81d8eeSLaurent Vivier 167021b65bbSTheodore Ts'o __u32 ext4_free_group_clusters(struct super_block *sb, 168560671a0SAneesh Kumar K.V struct ext4_group_desc *bg) 169560671a0SAneesh Kumar K.V { 170560671a0SAneesh Kumar K.V return le16_to_cpu(bg->bg_free_blocks_count_lo) | 171560671a0SAneesh Kumar K.V (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 172560671a0SAneesh Kumar K.V (__u32)le16_to_cpu(bg->bg_free_blocks_count_hi) << 16 : 0); 173560671a0SAneesh Kumar K.V } 174560671a0SAneesh Kumar K.V 175560671a0SAneesh Kumar K.V __u32 ext4_free_inodes_count(struct super_block *sb, 176560671a0SAneesh Kumar K.V struct ext4_group_desc *bg) 177560671a0SAneesh Kumar K.V { 178560671a0SAneesh Kumar K.V return le16_to_cpu(bg->bg_free_inodes_count_lo) | 179560671a0SAneesh Kumar K.V (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 180560671a0SAneesh Kumar K.V (__u32)le16_to_cpu(bg->bg_free_inodes_count_hi) << 16 : 0); 181560671a0SAneesh Kumar K.V } 182560671a0SAneesh Kumar K.V 183560671a0SAneesh Kumar K.V __u32 ext4_used_dirs_count(struct super_block *sb, 184560671a0SAneesh Kumar K.V struct ext4_group_desc *bg) 185560671a0SAneesh Kumar K.V { 186560671a0SAneesh Kumar K.V return le16_to_cpu(bg->bg_used_dirs_count_lo) | 187560671a0SAneesh Kumar K.V (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 188560671a0SAneesh Kumar K.V (__u32)le16_to_cpu(bg->bg_used_dirs_count_hi) << 16 : 0); 189560671a0SAneesh Kumar K.V } 190560671a0SAneesh Kumar K.V 191560671a0SAneesh Kumar K.V __u32 ext4_itable_unused_count(struct super_block *sb, 192560671a0SAneesh Kumar K.V struct ext4_group_desc *bg) 193560671a0SAneesh Kumar K.V { 194560671a0SAneesh Kumar K.V return le16_to_cpu(bg->bg_itable_unused_lo) | 195560671a0SAneesh Kumar K.V (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 196560671a0SAneesh Kumar K.V (__u32)le16_to_cpu(bg->bg_itable_unused_hi) << 16 : 0); 197560671a0SAneesh Kumar K.V } 198560671a0SAneesh Kumar K.V 1998fadc143SAlexandre Ratchov void ext4_block_bitmap_set(struct super_block *sb, 2008fadc143SAlexandre Ratchov struct ext4_group_desc *bg, ext4_fsblk_t blk) 201bd81d8eeSLaurent Vivier { 2023a14589cSAneesh Kumar K.V bg->bg_block_bitmap_lo = cpu_to_le32((u32)blk); 2038fadc143SAlexandre Ratchov if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 2048fadc143SAlexandre Ratchov bg->bg_block_bitmap_hi = cpu_to_le32(blk >> 32); 205bd81d8eeSLaurent Vivier } 206bd81d8eeSLaurent Vivier 2078fadc143SAlexandre Ratchov void ext4_inode_bitmap_set(struct super_block *sb, 2088fadc143SAlexandre Ratchov struct ext4_group_desc *bg, ext4_fsblk_t blk) 209bd81d8eeSLaurent Vivier { 2105272f837SAneesh Kumar K.V bg->bg_inode_bitmap_lo = cpu_to_le32((u32)blk); 2118fadc143SAlexandre Ratchov if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 2128fadc143SAlexandre Ratchov bg->bg_inode_bitmap_hi = cpu_to_le32(blk >> 32); 213bd81d8eeSLaurent Vivier } 214bd81d8eeSLaurent Vivier 2158fadc143SAlexandre Ratchov void ext4_inode_table_set(struct super_block *sb, 2168fadc143SAlexandre Ratchov struct ext4_group_desc *bg, ext4_fsblk_t blk) 217bd81d8eeSLaurent Vivier { 2185272f837SAneesh Kumar K.V bg->bg_inode_table_lo = cpu_to_le32((u32)blk); 2198fadc143SAlexandre Ratchov if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 2208fadc143SAlexandre Ratchov bg->bg_inode_table_hi = cpu_to_le32(blk >> 32); 221bd81d8eeSLaurent Vivier } 222bd81d8eeSLaurent Vivier 223021b65bbSTheodore Ts'o void ext4_free_group_clusters_set(struct super_block *sb, 224560671a0SAneesh Kumar K.V struct ext4_group_desc *bg, __u32 count) 225560671a0SAneesh Kumar K.V { 226560671a0SAneesh Kumar K.V bg->bg_free_blocks_count_lo = cpu_to_le16((__u16)count); 227560671a0SAneesh Kumar K.V if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 228560671a0SAneesh Kumar K.V bg->bg_free_blocks_count_hi = cpu_to_le16(count >> 16); 229560671a0SAneesh Kumar K.V } 230560671a0SAneesh Kumar K.V 231560671a0SAneesh Kumar K.V void ext4_free_inodes_set(struct super_block *sb, 232560671a0SAneesh Kumar K.V struct ext4_group_desc *bg, __u32 count) 233560671a0SAneesh Kumar K.V { 234560671a0SAneesh Kumar K.V bg->bg_free_inodes_count_lo = cpu_to_le16((__u16)count); 235560671a0SAneesh Kumar K.V if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 236560671a0SAneesh Kumar K.V bg->bg_free_inodes_count_hi = cpu_to_le16(count >> 16); 237560671a0SAneesh Kumar K.V } 238560671a0SAneesh Kumar K.V 239560671a0SAneesh Kumar K.V void ext4_used_dirs_set(struct super_block *sb, 240560671a0SAneesh Kumar K.V struct ext4_group_desc *bg, __u32 count) 241560671a0SAneesh Kumar K.V { 242560671a0SAneesh Kumar K.V bg->bg_used_dirs_count_lo = cpu_to_le16((__u16)count); 243560671a0SAneesh Kumar K.V if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 244560671a0SAneesh Kumar K.V bg->bg_used_dirs_count_hi = cpu_to_le16(count >> 16); 245560671a0SAneesh Kumar K.V } 246560671a0SAneesh Kumar K.V 247560671a0SAneesh Kumar K.V void ext4_itable_unused_set(struct super_block *sb, 248560671a0SAneesh Kumar K.V struct ext4_group_desc *bg, __u32 count) 249560671a0SAneesh Kumar K.V { 250560671a0SAneesh Kumar K.V bg->bg_itable_unused_lo = cpu_to_le16((__u16)count); 251560671a0SAneesh Kumar K.V if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 252560671a0SAneesh Kumar K.V bg->bg_itable_unused_hi = cpu_to_le16(count >> 16); 253560671a0SAneesh Kumar K.V } 254560671a0SAneesh Kumar K.V 255d3d1faf6SCurt Wohlgemuth 256d3d1faf6SCurt Wohlgemuth /* Just increment the non-pointer handle value */ 257d3d1faf6SCurt Wohlgemuth static handle_t *ext4_get_nojournal(void) 258d3d1faf6SCurt Wohlgemuth { 259d3d1faf6SCurt Wohlgemuth handle_t *handle = current->journal_info; 260d3d1faf6SCurt Wohlgemuth unsigned long ref_cnt = (unsigned long)handle; 261d3d1faf6SCurt Wohlgemuth 262d3d1faf6SCurt Wohlgemuth BUG_ON(ref_cnt >= EXT4_NOJOURNAL_MAX_REF_COUNT); 263d3d1faf6SCurt Wohlgemuth 264d3d1faf6SCurt Wohlgemuth ref_cnt++; 265d3d1faf6SCurt Wohlgemuth handle = (handle_t *)ref_cnt; 266d3d1faf6SCurt Wohlgemuth 267d3d1faf6SCurt Wohlgemuth current->journal_info = handle; 268d3d1faf6SCurt Wohlgemuth return handle; 269d3d1faf6SCurt Wohlgemuth } 270d3d1faf6SCurt Wohlgemuth 271d3d1faf6SCurt Wohlgemuth 272d3d1faf6SCurt Wohlgemuth /* Decrement the non-pointer handle value */ 273d3d1faf6SCurt Wohlgemuth static void ext4_put_nojournal(handle_t *handle) 274d3d1faf6SCurt Wohlgemuth { 275d3d1faf6SCurt Wohlgemuth unsigned long ref_cnt = (unsigned long)handle; 276d3d1faf6SCurt Wohlgemuth 277d3d1faf6SCurt Wohlgemuth BUG_ON(ref_cnt == 0); 278d3d1faf6SCurt Wohlgemuth 279d3d1faf6SCurt Wohlgemuth ref_cnt--; 280d3d1faf6SCurt Wohlgemuth handle = (handle_t *)ref_cnt; 281d3d1faf6SCurt Wohlgemuth 282d3d1faf6SCurt Wohlgemuth current->journal_info = handle; 283d3d1faf6SCurt Wohlgemuth } 284d3d1faf6SCurt Wohlgemuth 285ac27a0ecSDave Kleikamp /* 286dab291afSMingming Cao * Wrappers for jbd2_journal_start/end. 287ac27a0ecSDave Kleikamp * 288ac27a0ecSDave Kleikamp * The only special thing we need to do here is to make sure that all 289ac27a0ecSDave Kleikamp * journal_end calls result in the superblock being marked dirty, so 290ac27a0ecSDave Kleikamp * that sync() will call the filesystem's write_super callback if 291ac27a0ecSDave Kleikamp * appropriate. 292be4f27d3SYongqiang Yang * 293be4f27d3SYongqiang Yang * To avoid j_barrier hold in userspace when a user calls freeze(), 294be4f27d3SYongqiang Yang * ext4 prevents a new handle from being started by s_frozen, which 295be4f27d3SYongqiang Yang * is in an upper layer. 296ac27a0ecSDave Kleikamp */ 297617ba13bSMingming Cao handle_t *ext4_journal_start_sb(struct super_block *sb, int nblocks) 298ac27a0ecSDave Kleikamp { 299ac27a0ecSDave Kleikamp journal_t *journal; 300be4f27d3SYongqiang Yang handle_t *handle; 301ac27a0ecSDave Kleikamp 30212706394STheodore Ts'o trace_ext4_journal_start(sb, nblocks, _RET_IP_); 303ac27a0ecSDave Kleikamp if (sb->s_flags & MS_RDONLY) 304ac27a0ecSDave Kleikamp return ERR_PTR(-EROFS); 305ac27a0ecSDave Kleikamp 306617ba13bSMingming Cao journal = EXT4_SB(sb)->s_journal; 307be4f27d3SYongqiang Yang handle = ext4_journal_current_handle(); 308be4f27d3SYongqiang Yang 309be4f27d3SYongqiang Yang /* 310be4f27d3SYongqiang Yang * If a handle has been started, it should be allowed to 311be4f27d3SYongqiang Yang * finish, otherwise deadlock could happen between freeze 312be4f27d3SYongqiang Yang * and others(e.g. truncate) due to the restart of the 313be4f27d3SYongqiang Yang * journal handle if the filesystem is forzen and active 314be4f27d3SYongqiang Yang * handles are not stopped. 315be4f27d3SYongqiang Yang */ 316be4f27d3SYongqiang Yang if (!handle) 317be4f27d3SYongqiang Yang vfs_check_frozen(sb, SB_FREEZE_TRANS); 318be4f27d3SYongqiang Yang 319be4f27d3SYongqiang Yang if (!journal) 320be4f27d3SYongqiang Yang return ext4_get_nojournal(); 321be4f27d3SYongqiang Yang /* 322be4f27d3SYongqiang Yang * Special case here: if the journal has aborted behind our 323be4f27d3SYongqiang Yang * backs (eg. EIO in the commit thread), then we still need to 324be4f27d3SYongqiang Yang * take the FS itself readonly cleanly. 325be4f27d3SYongqiang Yang */ 326ac27a0ecSDave Kleikamp if (is_journal_aborted(journal)) { 327c67d859eSTheodore Ts'o ext4_abort(sb, "Detected aborted journal"); 328ac27a0ecSDave Kleikamp return ERR_PTR(-EROFS); 329ac27a0ecSDave Kleikamp } 330dab291afSMingming Cao return jbd2_journal_start(journal, nblocks); 331ac27a0ecSDave Kleikamp } 332ac27a0ecSDave Kleikamp 333ac27a0ecSDave Kleikamp /* 334ac27a0ecSDave Kleikamp * The only special thing we need to do here is to make sure that all 335dab291afSMingming Cao * jbd2_journal_stop calls result in the superblock being marked dirty, so 336ac27a0ecSDave Kleikamp * that sync() will call the filesystem's write_super callback if 337ac27a0ecSDave Kleikamp * appropriate. 338ac27a0ecSDave Kleikamp */ 339c398eda0STheodore Ts'o int __ext4_journal_stop(const char *where, unsigned int line, handle_t *handle) 340ac27a0ecSDave Kleikamp { 341ac27a0ecSDave Kleikamp struct super_block *sb; 342ac27a0ecSDave Kleikamp int err; 343ac27a0ecSDave Kleikamp int rc; 344ac27a0ecSDave Kleikamp 3450390131bSFrank Mayhar if (!ext4_handle_valid(handle)) { 346d3d1faf6SCurt Wohlgemuth ext4_put_nojournal(handle); 3470390131bSFrank Mayhar return 0; 3480390131bSFrank Mayhar } 349ac27a0ecSDave Kleikamp sb = handle->h_transaction->t_journal->j_private; 350ac27a0ecSDave Kleikamp err = handle->h_err; 351dab291afSMingming Cao rc = jbd2_journal_stop(handle); 352ac27a0ecSDave Kleikamp 353ac27a0ecSDave Kleikamp if (!err) 354ac27a0ecSDave Kleikamp err = rc; 355ac27a0ecSDave Kleikamp if (err) 356c398eda0STheodore Ts'o __ext4_std_error(sb, where, line, err); 357ac27a0ecSDave Kleikamp return err; 358ac27a0ecSDave Kleikamp } 359ac27a0ecSDave Kleikamp 36090c7201bSTheodore Ts'o void ext4_journal_abort_handle(const char *caller, unsigned int line, 36190c7201bSTheodore Ts'o const char *err_fn, struct buffer_head *bh, 36290c7201bSTheodore Ts'o handle_t *handle, int err) 363ac27a0ecSDave Kleikamp { 364ac27a0ecSDave Kleikamp char nbuf[16]; 365617ba13bSMingming Cao const char *errstr = ext4_decode_error(NULL, err, nbuf); 366ac27a0ecSDave Kleikamp 3670390131bSFrank Mayhar BUG_ON(!ext4_handle_valid(handle)); 3680390131bSFrank Mayhar 369ac27a0ecSDave Kleikamp if (bh) 370ac27a0ecSDave Kleikamp BUFFER_TRACE(bh, "abort"); 371ac27a0ecSDave Kleikamp 372ac27a0ecSDave Kleikamp if (!handle->h_err) 373ac27a0ecSDave Kleikamp handle->h_err = err; 374ac27a0ecSDave Kleikamp 375ac27a0ecSDave Kleikamp if (is_handle_aborted(handle)) 376ac27a0ecSDave Kleikamp return; 377ac27a0ecSDave Kleikamp 37890c7201bSTheodore Ts'o printk(KERN_ERR "%s:%d: aborting transaction: %s in %s\n", 37990c7201bSTheodore Ts'o caller, line, errstr, err_fn); 380ac27a0ecSDave Kleikamp 381dab291afSMingming Cao jbd2_journal_abort_handle(handle); 382ac27a0ecSDave Kleikamp } 383ac27a0ecSDave Kleikamp 3841c13d5c0STheodore Ts'o static void __save_error_info(struct super_block *sb, const char *func, 3851c13d5c0STheodore Ts'o unsigned int line) 3861c13d5c0STheodore Ts'o { 3871c13d5c0STheodore Ts'o struct ext4_super_block *es = EXT4_SB(sb)->s_es; 3881c13d5c0STheodore Ts'o 3891c13d5c0STheodore Ts'o EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; 3901c13d5c0STheodore Ts'o es->s_state |= cpu_to_le16(EXT4_ERROR_FS); 3911c13d5c0STheodore Ts'o es->s_last_error_time = cpu_to_le32(get_seconds()); 3921c13d5c0STheodore Ts'o strncpy(es->s_last_error_func, func, sizeof(es->s_last_error_func)); 3931c13d5c0STheodore Ts'o es->s_last_error_line = cpu_to_le32(line); 3941c13d5c0STheodore Ts'o if (!es->s_first_error_time) { 3951c13d5c0STheodore Ts'o es->s_first_error_time = es->s_last_error_time; 3961c13d5c0STheodore Ts'o strncpy(es->s_first_error_func, func, 3971c13d5c0STheodore Ts'o sizeof(es->s_first_error_func)); 3981c13d5c0STheodore Ts'o es->s_first_error_line = cpu_to_le32(line); 3991c13d5c0STheodore Ts'o es->s_first_error_ino = es->s_last_error_ino; 4001c13d5c0STheodore Ts'o es->s_first_error_block = es->s_last_error_block; 4011c13d5c0STheodore Ts'o } 40266e61a9eSTheodore Ts'o /* 40366e61a9eSTheodore Ts'o * Start the daily error reporting function if it hasn't been 40466e61a9eSTheodore Ts'o * started already 40566e61a9eSTheodore Ts'o */ 40666e61a9eSTheodore Ts'o if (!es->s_error_count) 40766e61a9eSTheodore Ts'o mod_timer(&EXT4_SB(sb)->s_err_report, jiffies + 24*60*60*HZ); 4081c13d5c0STheodore Ts'o es->s_error_count = cpu_to_le32(le32_to_cpu(es->s_error_count) + 1); 4091c13d5c0STheodore Ts'o } 4101c13d5c0STheodore Ts'o 4111c13d5c0STheodore Ts'o static void save_error_info(struct super_block *sb, const char *func, 4121c13d5c0STheodore Ts'o unsigned int line) 4131c13d5c0STheodore Ts'o { 4141c13d5c0STheodore Ts'o __save_error_info(sb, func, line); 4151c13d5c0STheodore Ts'o ext4_commit_super(sb, 1); 4161c13d5c0STheodore Ts'o } 4171c13d5c0STheodore Ts'o 4187c2e7087STheodore Ts'o /* 4197c2e7087STheodore Ts'o * The del_gendisk() function uninitializes the disk-specific data 4207c2e7087STheodore Ts'o * structures, including the bdi structure, without telling anyone 4217c2e7087STheodore Ts'o * else. Once this happens, any attempt to call mark_buffer_dirty() 4227c2e7087STheodore Ts'o * (for example, by ext4_commit_super), will cause a kernel OOPS. 4237c2e7087STheodore Ts'o * This is a kludge to prevent these oops until we can put in a proper 4247c2e7087STheodore Ts'o * hook in del_gendisk() to inform the VFS and file system layers. 4257c2e7087STheodore Ts'o */ 4267c2e7087STheodore Ts'o static int block_device_ejected(struct super_block *sb) 4277c2e7087STheodore Ts'o { 4287c2e7087STheodore Ts'o struct inode *bd_inode = sb->s_bdev->bd_inode; 4297c2e7087STheodore Ts'o struct backing_dev_info *bdi = bd_inode->i_mapping->backing_dev_info; 4307c2e7087STheodore Ts'o 4317c2e7087STheodore Ts'o return bdi->dev == NULL; 4327c2e7087STheodore Ts'o } 4337c2e7087STheodore Ts'o 4341c13d5c0STheodore Ts'o 435ac27a0ecSDave Kleikamp /* Deal with the reporting of failure conditions on a filesystem such as 436ac27a0ecSDave Kleikamp * inconsistencies detected or read IO failures. 437ac27a0ecSDave Kleikamp * 438ac27a0ecSDave Kleikamp * On ext2, we can store the error state of the filesystem in the 439617ba13bSMingming Cao * superblock. That is not possible on ext4, because we may have other 440ac27a0ecSDave Kleikamp * write ordering constraints on the superblock which prevent us from 441ac27a0ecSDave Kleikamp * writing it out straight away; and given that the journal is about to 442ac27a0ecSDave Kleikamp * be aborted, we can't rely on the current, or future, transactions to 443ac27a0ecSDave Kleikamp * write out the superblock safely. 444ac27a0ecSDave Kleikamp * 445dab291afSMingming Cao * We'll just use the jbd2_journal_abort() error code to record an error in 446d6b198bcSThadeu Lima de Souza Cascardo * the journal instead. On recovery, the journal will complain about 447ac27a0ecSDave Kleikamp * that error until we've noted it down and cleared it. 448ac27a0ecSDave Kleikamp */ 449ac27a0ecSDave Kleikamp 450617ba13bSMingming Cao static void ext4_handle_error(struct super_block *sb) 451ac27a0ecSDave Kleikamp { 452ac27a0ecSDave Kleikamp if (sb->s_flags & MS_RDONLY) 453ac27a0ecSDave Kleikamp return; 454ac27a0ecSDave Kleikamp 455ac27a0ecSDave Kleikamp if (!test_opt(sb, ERRORS_CONT)) { 456617ba13bSMingming Cao journal_t *journal = EXT4_SB(sb)->s_journal; 457ac27a0ecSDave Kleikamp 4584ab2f15bSTheodore Ts'o EXT4_SB(sb)->s_mount_flags |= EXT4_MF_FS_ABORTED; 459ac27a0ecSDave Kleikamp if (journal) 460dab291afSMingming Cao jbd2_journal_abort(journal, -EIO); 461ac27a0ecSDave Kleikamp } 462ac27a0ecSDave Kleikamp if (test_opt(sb, ERRORS_RO)) { 463b31e1552SEric Sandeen ext4_msg(sb, KERN_CRIT, "Remounting filesystem read-only"); 464ac27a0ecSDave Kleikamp sb->s_flags |= MS_RDONLY; 465ac27a0ecSDave Kleikamp } 466ac27a0ecSDave Kleikamp if (test_opt(sb, ERRORS_PANIC)) 467617ba13bSMingming Cao panic("EXT4-fs (device %s): panic forced after error\n", 468ac27a0ecSDave Kleikamp sb->s_id); 469ac27a0ecSDave Kleikamp } 470ac27a0ecSDave Kleikamp 47112062dddSEric Sandeen void __ext4_error(struct super_block *sb, const char *function, 472c398eda0STheodore Ts'o unsigned int line, const char *fmt, ...) 473ac27a0ecSDave Kleikamp { 4740ff2ea7dSJoe Perches struct va_format vaf; 475ac27a0ecSDave Kleikamp va_list args; 476ac27a0ecSDave Kleikamp 477ac27a0ecSDave Kleikamp va_start(args, fmt); 4780ff2ea7dSJoe Perches vaf.fmt = fmt; 4790ff2ea7dSJoe Perches vaf.va = &args; 4800ff2ea7dSJoe Perches printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: comm %s: %pV\n", 4810ff2ea7dSJoe Perches sb->s_id, function, line, current->comm, &vaf); 482ac27a0ecSDave Kleikamp va_end(args); 483ac27a0ecSDave Kleikamp 484617ba13bSMingming Cao ext4_handle_error(sb); 485ac27a0ecSDave Kleikamp } 486ac27a0ecSDave Kleikamp 487c398eda0STheodore Ts'o void ext4_error_inode(struct inode *inode, const char *function, 488c398eda0STheodore Ts'o unsigned int line, ext4_fsblk_t block, 489273df556SFrank Mayhar const char *fmt, ...) 490273df556SFrank Mayhar { 491273df556SFrank Mayhar va_list args; 492f7c21177STheodore Ts'o struct va_format vaf; 4931c13d5c0STheodore Ts'o struct ext4_super_block *es = EXT4_SB(inode->i_sb)->s_es; 494273df556SFrank Mayhar 4951c13d5c0STheodore Ts'o es->s_last_error_ino = cpu_to_le32(inode->i_ino); 4961c13d5c0STheodore Ts'o es->s_last_error_block = cpu_to_le64(block); 4971c13d5c0STheodore Ts'o save_error_info(inode->i_sb, function, line); 498273df556SFrank Mayhar va_start(args, fmt); 499f7c21177STheodore Ts'o vaf.fmt = fmt; 500f7c21177STheodore Ts'o vaf.va = &args; 501c398eda0STheodore Ts'o printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: inode #%lu: ", 502c398eda0STheodore Ts'o inode->i_sb->s_id, function, line, inode->i_ino); 503c398eda0STheodore Ts'o if (block) 504f7c21177STheodore Ts'o printk(KERN_CONT "block %llu: ", block); 505f7c21177STheodore Ts'o printk(KERN_CONT "comm %s: %pV\n", current->comm, &vaf); 506273df556SFrank Mayhar va_end(args); 507273df556SFrank Mayhar 508273df556SFrank Mayhar ext4_handle_error(inode->i_sb); 509273df556SFrank Mayhar } 510273df556SFrank Mayhar 511c398eda0STheodore Ts'o void ext4_error_file(struct file *file, const char *function, 512f7c21177STheodore Ts'o unsigned int line, ext4_fsblk_t block, 513f7c21177STheodore Ts'o const char *fmt, ...) 514273df556SFrank Mayhar { 515273df556SFrank Mayhar va_list args; 516f7c21177STheodore Ts'o struct va_format vaf; 5171c13d5c0STheodore Ts'o struct ext4_super_block *es; 518273df556SFrank Mayhar struct inode *inode = file->f_dentry->d_inode; 519273df556SFrank Mayhar char pathname[80], *path; 520273df556SFrank Mayhar 5211c13d5c0STheodore Ts'o es = EXT4_SB(inode->i_sb)->s_es; 5221c13d5c0STheodore Ts'o es->s_last_error_ino = cpu_to_le32(inode->i_ino); 5231c13d5c0STheodore Ts'o save_error_info(inode->i_sb, function, line); 524273df556SFrank Mayhar path = d_path(&(file->f_path), pathname, sizeof(pathname)); 525f9a62d09SDan Carpenter if (IS_ERR(path)) 526273df556SFrank Mayhar path = "(unknown)"; 527273df556SFrank Mayhar printk(KERN_CRIT 528f7c21177STheodore Ts'o "EXT4-fs error (device %s): %s:%d: inode #%lu: ", 529f7c21177STheodore Ts'o inode->i_sb->s_id, function, line, inode->i_ino); 530f7c21177STheodore Ts'o if (block) 531f7c21177STheodore Ts'o printk(KERN_CONT "block %llu: ", block); 532f7c21177STheodore Ts'o va_start(args, fmt); 533f7c21177STheodore Ts'o vaf.fmt = fmt; 534f7c21177STheodore Ts'o vaf.va = &args; 535f7c21177STheodore Ts'o printk(KERN_CONT "comm %s: path %s: %pV\n", current->comm, path, &vaf); 536273df556SFrank Mayhar va_end(args); 537273df556SFrank Mayhar 538273df556SFrank Mayhar ext4_handle_error(inode->i_sb); 539273df556SFrank Mayhar } 540273df556SFrank Mayhar 541617ba13bSMingming Cao static const char *ext4_decode_error(struct super_block *sb, int errno, 542ac27a0ecSDave Kleikamp char nbuf[16]) 543ac27a0ecSDave Kleikamp { 544ac27a0ecSDave Kleikamp char *errstr = NULL; 545ac27a0ecSDave Kleikamp 546ac27a0ecSDave Kleikamp switch (errno) { 547ac27a0ecSDave Kleikamp case -EIO: 548ac27a0ecSDave Kleikamp errstr = "IO failure"; 549ac27a0ecSDave Kleikamp break; 550ac27a0ecSDave Kleikamp case -ENOMEM: 551ac27a0ecSDave Kleikamp errstr = "Out of memory"; 552ac27a0ecSDave Kleikamp break; 553ac27a0ecSDave Kleikamp case -EROFS: 55478f1ddbbSTheodore Ts'o if (!sb || (EXT4_SB(sb)->s_journal && 55578f1ddbbSTheodore Ts'o EXT4_SB(sb)->s_journal->j_flags & JBD2_ABORT)) 556ac27a0ecSDave Kleikamp errstr = "Journal has aborted"; 557ac27a0ecSDave Kleikamp else 558ac27a0ecSDave Kleikamp errstr = "Readonly filesystem"; 559ac27a0ecSDave Kleikamp break; 560ac27a0ecSDave Kleikamp default: 561ac27a0ecSDave Kleikamp /* If the caller passed in an extra buffer for unknown 562ac27a0ecSDave Kleikamp * errors, textualise them now. Else we just return 563ac27a0ecSDave Kleikamp * NULL. */ 564ac27a0ecSDave Kleikamp if (nbuf) { 565ac27a0ecSDave Kleikamp /* Check for truncated error codes... */ 566ac27a0ecSDave Kleikamp if (snprintf(nbuf, 16, "error %d", -errno) >= 0) 567ac27a0ecSDave Kleikamp errstr = nbuf; 568ac27a0ecSDave Kleikamp } 569ac27a0ecSDave Kleikamp break; 570ac27a0ecSDave Kleikamp } 571ac27a0ecSDave Kleikamp 572ac27a0ecSDave Kleikamp return errstr; 573ac27a0ecSDave Kleikamp } 574ac27a0ecSDave Kleikamp 575617ba13bSMingming Cao /* __ext4_std_error decodes expected errors from journaling functions 576ac27a0ecSDave Kleikamp * automatically and invokes the appropriate error response. */ 577ac27a0ecSDave Kleikamp 578c398eda0STheodore Ts'o void __ext4_std_error(struct super_block *sb, const char *function, 579c398eda0STheodore Ts'o unsigned int line, int errno) 580ac27a0ecSDave Kleikamp { 581ac27a0ecSDave Kleikamp char nbuf[16]; 582ac27a0ecSDave Kleikamp const char *errstr; 583ac27a0ecSDave Kleikamp 584ac27a0ecSDave Kleikamp /* Special case: if the error is EROFS, and we're not already 585ac27a0ecSDave Kleikamp * inside a transaction, then there's really no point in logging 586ac27a0ecSDave Kleikamp * an error. */ 587ac27a0ecSDave Kleikamp if (errno == -EROFS && journal_current_handle() == NULL && 588ac27a0ecSDave Kleikamp (sb->s_flags & MS_RDONLY)) 589ac27a0ecSDave Kleikamp return; 590ac27a0ecSDave Kleikamp 591617ba13bSMingming Cao errstr = ext4_decode_error(sb, errno, nbuf); 592c398eda0STheodore Ts'o printk(KERN_CRIT "EXT4-fs error (device %s) in %s:%d: %s\n", 593c398eda0STheodore Ts'o sb->s_id, function, line, errstr); 5941c13d5c0STheodore Ts'o save_error_info(sb, function, line); 595ac27a0ecSDave Kleikamp 596617ba13bSMingming Cao ext4_handle_error(sb); 597ac27a0ecSDave Kleikamp } 598ac27a0ecSDave Kleikamp 599ac27a0ecSDave Kleikamp /* 600617ba13bSMingming Cao * ext4_abort is a much stronger failure handler than ext4_error. The 601ac27a0ecSDave Kleikamp * abort function may be used to deal with unrecoverable failures such 602ac27a0ecSDave Kleikamp * as journal IO errors or ENOMEM at a critical moment in log management. 603ac27a0ecSDave Kleikamp * 604ac27a0ecSDave Kleikamp * We unconditionally force the filesystem into an ABORT|READONLY state, 605ac27a0ecSDave Kleikamp * unless the error response on the fs has been set to panic in which 606ac27a0ecSDave Kleikamp * case we take the easy way out and panic immediately. 607ac27a0ecSDave Kleikamp */ 608ac27a0ecSDave Kleikamp 609c67d859eSTheodore Ts'o void __ext4_abort(struct super_block *sb, const char *function, 610c398eda0STheodore Ts'o unsigned int line, const char *fmt, ...) 611ac27a0ecSDave Kleikamp { 612ac27a0ecSDave Kleikamp va_list args; 613ac27a0ecSDave Kleikamp 6141c13d5c0STheodore Ts'o save_error_info(sb, function, line); 615ac27a0ecSDave Kleikamp va_start(args, fmt); 616c398eda0STheodore Ts'o printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: ", sb->s_id, 617c398eda0STheodore Ts'o function, line); 618ac27a0ecSDave Kleikamp vprintk(fmt, args); 619ac27a0ecSDave Kleikamp printk("\n"); 620ac27a0ecSDave Kleikamp va_end(args); 621ac27a0ecSDave Kleikamp 6221c13d5c0STheodore Ts'o if ((sb->s_flags & MS_RDONLY) == 0) { 623b31e1552SEric Sandeen ext4_msg(sb, KERN_CRIT, "Remounting filesystem read-only"); 624ac27a0ecSDave Kleikamp sb->s_flags |= MS_RDONLY; 6254ab2f15bSTheodore Ts'o EXT4_SB(sb)->s_mount_flags |= EXT4_MF_FS_ABORTED; 626ef2cabf7SHidehiro Kawai if (EXT4_SB(sb)->s_journal) 627dab291afSMingming Cao jbd2_journal_abort(EXT4_SB(sb)->s_journal, -EIO); 6281c13d5c0STheodore Ts'o save_error_info(sb, function, line); 6291c13d5c0STheodore Ts'o } 6301c13d5c0STheodore Ts'o if (test_opt(sb, ERRORS_PANIC)) 6311c13d5c0STheodore Ts'o panic("EXT4-fs panic from previous error\n"); 632ac27a0ecSDave Kleikamp } 633ac27a0ecSDave Kleikamp 6340ff2ea7dSJoe Perches void ext4_msg(struct super_block *sb, const char *prefix, const char *fmt, ...) 635b31e1552SEric Sandeen { 6360ff2ea7dSJoe Perches struct va_format vaf; 637b31e1552SEric Sandeen va_list args; 638b31e1552SEric Sandeen 639b31e1552SEric Sandeen va_start(args, fmt); 6400ff2ea7dSJoe Perches vaf.fmt = fmt; 6410ff2ea7dSJoe Perches vaf.va = &args; 6420ff2ea7dSJoe Perches printk("%sEXT4-fs (%s): %pV\n", prefix, sb->s_id, &vaf); 643b31e1552SEric Sandeen va_end(args); 644b31e1552SEric Sandeen } 645b31e1552SEric Sandeen 64612062dddSEric Sandeen void __ext4_warning(struct super_block *sb, const char *function, 647c398eda0STheodore Ts'o unsigned int line, const char *fmt, ...) 648ac27a0ecSDave Kleikamp { 6490ff2ea7dSJoe Perches struct va_format vaf; 650ac27a0ecSDave Kleikamp va_list args; 651ac27a0ecSDave Kleikamp 652ac27a0ecSDave Kleikamp va_start(args, fmt); 6530ff2ea7dSJoe Perches vaf.fmt = fmt; 6540ff2ea7dSJoe Perches vaf.va = &args; 6550ff2ea7dSJoe Perches printk(KERN_WARNING "EXT4-fs warning (device %s): %s:%d: %pV\n", 6560ff2ea7dSJoe Perches sb->s_id, function, line, &vaf); 657ac27a0ecSDave Kleikamp va_end(args); 658ac27a0ecSDave Kleikamp } 659ac27a0ecSDave Kleikamp 660e29136f8STheodore Ts'o void __ext4_grp_locked_error(const char *function, unsigned int line, 661e29136f8STheodore Ts'o struct super_block *sb, ext4_group_t grp, 662e29136f8STheodore Ts'o unsigned long ino, ext4_fsblk_t block, 663e29136f8STheodore Ts'o const char *fmt, ...) 6645d1b1b3fSAneesh Kumar K.V __releases(bitlock) 6655d1b1b3fSAneesh Kumar K.V __acquires(bitlock) 6665d1b1b3fSAneesh Kumar K.V { 6670ff2ea7dSJoe Perches struct va_format vaf; 6685d1b1b3fSAneesh Kumar K.V va_list args; 6695d1b1b3fSAneesh Kumar K.V struct ext4_super_block *es = EXT4_SB(sb)->s_es; 6705d1b1b3fSAneesh Kumar K.V 6711c13d5c0STheodore Ts'o es->s_last_error_ino = cpu_to_le32(ino); 6721c13d5c0STheodore Ts'o es->s_last_error_block = cpu_to_le64(block); 6731c13d5c0STheodore Ts'o __save_error_info(sb, function, line); 6740ff2ea7dSJoe Perches 6755d1b1b3fSAneesh Kumar K.V va_start(args, fmt); 6760ff2ea7dSJoe Perches 6770ff2ea7dSJoe Perches vaf.fmt = fmt; 6780ff2ea7dSJoe Perches vaf.va = &args; 67921149d61SRobin Dong printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: group %u, ", 680e29136f8STheodore Ts'o sb->s_id, function, line, grp); 681e29136f8STheodore Ts'o if (ino) 6820ff2ea7dSJoe Perches printk(KERN_CONT "inode %lu: ", ino); 683e29136f8STheodore Ts'o if (block) 6840ff2ea7dSJoe Perches printk(KERN_CONT "block %llu:", (unsigned long long) block); 6850ff2ea7dSJoe Perches printk(KERN_CONT "%pV\n", &vaf); 6865d1b1b3fSAneesh Kumar K.V va_end(args); 6875d1b1b3fSAneesh Kumar K.V 6885d1b1b3fSAneesh Kumar K.V if (test_opt(sb, ERRORS_CONT)) { 689e2d67052STheodore Ts'o ext4_commit_super(sb, 0); 6905d1b1b3fSAneesh Kumar K.V return; 6915d1b1b3fSAneesh Kumar K.V } 6921c13d5c0STheodore Ts'o 6935d1b1b3fSAneesh Kumar K.V ext4_unlock_group(sb, grp); 6945d1b1b3fSAneesh Kumar K.V ext4_handle_error(sb); 6955d1b1b3fSAneesh Kumar K.V /* 6965d1b1b3fSAneesh Kumar K.V * We only get here in the ERRORS_RO case; relocking the group 6975d1b1b3fSAneesh Kumar K.V * may be dangerous, but nothing bad will happen since the 6985d1b1b3fSAneesh Kumar K.V * filesystem will have already been marked read/only and the 6995d1b1b3fSAneesh Kumar K.V * journal has been aborted. We return 1 as a hint to callers 7005d1b1b3fSAneesh Kumar K.V * who might what to use the return value from 70125985edcSLucas De Marchi * ext4_grp_locked_error() to distinguish between the 7025d1b1b3fSAneesh Kumar K.V * ERRORS_CONT and ERRORS_RO case, and perhaps return more 7035d1b1b3fSAneesh Kumar K.V * aggressively from the ext4 function in question, with a 7045d1b1b3fSAneesh Kumar K.V * more appropriate error code. 7055d1b1b3fSAneesh Kumar K.V */ 7065d1b1b3fSAneesh Kumar K.V ext4_lock_group(sb, grp); 7075d1b1b3fSAneesh Kumar K.V return; 7085d1b1b3fSAneesh Kumar K.V } 7095d1b1b3fSAneesh Kumar K.V 710617ba13bSMingming Cao void ext4_update_dynamic_rev(struct super_block *sb) 711ac27a0ecSDave Kleikamp { 712617ba13bSMingming Cao struct ext4_super_block *es = EXT4_SB(sb)->s_es; 713ac27a0ecSDave Kleikamp 714617ba13bSMingming Cao if (le32_to_cpu(es->s_rev_level) > EXT4_GOOD_OLD_REV) 715ac27a0ecSDave Kleikamp return; 716ac27a0ecSDave Kleikamp 71712062dddSEric Sandeen ext4_warning(sb, 718ac27a0ecSDave Kleikamp "updating to rev %d because of new feature flag, " 719ac27a0ecSDave Kleikamp "running e2fsck is recommended", 720617ba13bSMingming Cao EXT4_DYNAMIC_REV); 721ac27a0ecSDave Kleikamp 722617ba13bSMingming Cao es->s_first_ino = cpu_to_le32(EXT4_GOOD_OLD_FIRST_INO); 723617ba13bSMingming Cao es->s_inode_size = cpu_to_le16(EXT4_GOOD_OLD_INODE_SIZE); 724617ba13bSMingming Cao es->s_rev_level = cpu_to_le32(EXT4_DYNAMIC_REV); 725ac27a0ecSDave Kleikamp /* leave es->s_feature_*compat flags alone */ 726ac27a0ecSDave Kleikamp /* es->s_uuid will be set by e2fsck if empty */ 727ac27a0ecSDave Kleikamp 728ac27a0ecSDave Kleikamp /* 729ac27a0ecSDave Kleikamp * The rest of the superblock fields should be zero, and if not it 730ac27a0ecSDave Kleikamp * means they are likely already in use, so leave them alone. We 731ac27a0ecSDave Kleikamp * can leave it up to e2fsck to clean up any inconsistencies there. 732ac27a0ecSDave Kleikamp */ 733ac27a0ecSDave Kleikamp } 734ac27a0ecSDave Kleikamp 735ac27a0ecSDave Kleikamp /* 736ac27a0ecSDave Kleikamp * Open the external journal device 737ac27a0ecSDave Kleikamp */ 738b31e1552SEric Sandeen static struct block_device *ext4_blkdev_get(dev_t dev, struct super_block *sb) 739ac27a0ecSDave Kleikamp { 740ac27a0ecSDave Kleikamp struct block_device *bdev; 741ac27a0ecSDave Kleikamp char b[BDEVNAME_SIZE]; 742ac27a0ecSDave Kleikamp 743d4d77629STejun Heo bdev = blkdev_get_by_dev(dev, FMODE_READ|FMODE_WRITE|FMODE_EXCL, sb); 744ac27a0ecSDave Kleikamp if (IS_ERR(bdev)) 745ac27a0ecSDave Kleikamp goto fail; 746ac27a0ecSDave Kleikamp return bdev; 747ac27a0ecSDave Kleikamp 748ac27a0ecSDave Kleikamp fail: 749b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "failed to open journal device %s: %ld", 750ac27a0ecSDave Kleikamp __bdevname(dev, b), PTR_ERR(bdev)); 751ac27a0ecSDave Kleikamp return NULL; 752ac27a0ecSDave Kleikamp } 753ac27a0ecSDave Kleikamp 754ac27a0ecSDave Kleikamp /* 755ac27a0ecSDave Kleikamp * Release the journal device 756ac27a0ecSDave Kleikamp */ 757617ba13bSMingming Cao static int ext4_blkdev_put(struct block_device *bdev) 758ac27a0ecSDave Kleikamp { 759e525fd89STejun Heo return blkdev_put(bdev, FMODE_READ|FMODE_WRITE|FMODE_EXCL); 760ac27a0ecSDave Kleikamp } 761ac27a0ecSDave Kleikamp 762617ba13bSMingming Cao static int ext4_blkdev_remove(struct ext4_sb_info *sbi) 763ac27a0ecSDave Kleikamp { 764ac27a0ecSDave Kleikamp struct block_device *bdev; 765ac27a0ecSDave Kleikamp int ret = -ENODEV; 766ac27a0ecSDave Kleikamp 767ac27a0ecSDave Kleikamp bdev = sbi->journal_bdev; 768ac27a0ecSDave Kleikamp if (bdev) { 769617ba13bSMingming Cao ret = ext4_blkdev_put(bdev); 770ac27a0ecSDave Kleikamp sbi->journal_bdev = NULL; 771ac27a0ecSDave Kleikamp } 772ac27a0ecSDave Kleikamp return ret; 773ac27a0ecSDave Kleikamp } 774ac27a0ecSDave Kleikamp 775ac27a0ecSDave Kleikamp static inline struct inode *orphan_list_entry(struct list_head *l) 776ac27a0ecSDave Kleikamp { 777617ba13bSMingming Cao return &list_entry(l, struct ext4_inode_info, i_orphan)->vfs_inode; 778ac27a0ecSDave Kleikamp } 779ac27a0ecSDave Kleikamp 780617ba13bSMingming Cao static void dump_orphan_list(struct super_block *sb, struct ext4_sb_info *sbi) 781ac27a0ecSDave Kleikamp { 782ac27a0ecSDave Kleikamp struct list_head *l; 783ac27a0ecSDave Kleikamp 784b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "sb orphan head is %d", 785ac27a0ecSDave Kleikamp le32_to_cpu(sbi->s_es->s_last_orphan)); 786ac27a0ecSDave Kleikamp 787ac27a0ecSDave Kleikamp printk(KERN_ERR "sb_info orphan list:\n"); 788ac27a0ecSDave Kleikamp list_for_each(l, &sbi->s_orphan) { 789ac27a0ecSDave Kleikamp struct inode *inode = orphan_list_entry(l); 790ac27a0ecSDave Kleikamp printk(KERN_ERR " " 791ac27a0ecSDave Kleikamp "inode %s:%lu at %p: mode %o, nlink %d, next %d\n", 792ac27a0ecSDave Kleikamp inode->i_sb->s_id, inode->i_ino, inode, 793ac27a0ecSDave Kleikamp inode->i_mode, inode->i_nlink, 794ac27a0ecSDave Kleikamp NEXT_ORPHAN(inode)); 795ac27a0ecSDave Kleikamp } 796ac27a0ecSDave Kleikamp } 797ac27a0ecSDave Kleikamp 798617ba13bSMingming Cao static void ext4_put_super(struct super_block *sb) 799ac27a0ecSDave Kleikamp { 800617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 801617ba13bSMingming Cao struct ext4_super_block *es = sbi->s_es; 802ef2cabf7SHidehiro Kawai int i, err; 803ac27a0ecSDave Kleikamp 804857ac889SLukas Czerner ext4_unregister_li_request(sb); 805e0ccfd95SChristoph Hellwig dquot_disable(sb, -1, DQUOT_USAGE_ENABLED | DQUOT_LIMITS_ENABLED); 806e0ccfd95SChristoph Hellwig 8074c0425ffSMingming Cao flush_workqueue(sbi->dio_unwritten_wq); 8084c0425ffSMingming Cao destroy_workqueue(sbi->dio_unwritten_wq); 8094c0425ffSMingming Cao 810a9e220f8SAl Viro lock_super(sb); 8118c85e125SChristoph Hellwig if (sb->s_dirt) 812ebc1ac16SChristoph Hellwig ext4_commit_super(sb, 1); 8138c85e125SChristoph Hellwig 8140390131bSFrank Mayhar if (sbi->s_journal) { 815ef2cabf7SHidehiro Kawai err = jbd2_journal_destroy(sbi->s_journal); 81647b4a50bSJan Kara sbi->s_journal = NULL; 817ef2cabf7SHidehiro Kawai if (err < 0) 818c67d859eSTheodore Ts'o ext4_abort(sb, "Couldn't clean up the journal"); 8190390131bSFrank Mayhar } 820d4edac31SJosef Bacik 821a1c6c569SSergey Senozhatsky del_timer(&sbi->s_err_report); 822d4edac31SJosef Bacik ext4_release_system_zone(sb); 823d4edac31SJosef Bacik ext4_mb_release(sb); 824d4edac31SJosef Bacik ext4_ext_release(sb); 825d4edac31SJosef Bacik ext4_xattr_put_super(sb); 826d4edac31SJosef Bacik 827ac27a0ecSDave Kleikamp if (!(sb->s_flags & MS_RDONLY)) { 828617ba13bSMingming Cao EXT4_CLEAR_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); 829ac27a0ecSDave Kleikamp es->s_state = cpu_to_le16(sbi->s_mount_state); 830e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 831ac27a0ecSDave Kleikamp } 832240799cdSTheodore Ts'o if (sbi->s_proc) { 8339f6200bbSTheodore Ts'o remove_proc_entry(sb->s_id, ext4_proc_root); 834240799cdSTheodore Ts'o } 8353197ebdbSTheodore Ts'o kobject_del(&sbi->s_kobj); 836ac27a0ecSDave Kleikamp 837ac27a0ecSDave Kleikamp for (i = 0; i < sbi->s_gdb_count; i++) 838ac27a0ecSDave Kleikamp brelse(sbi->s_group_desc[i]); 839f18a5f21STheodore Ts'o ext4_kvfree(sbi->s_group_desc); 8409933fc0aSTheodore Ts'o ext4_kvfree(sbi->s_flex_groups); 84157042651STheodore Ts'o percpu_counter_destroy(&sbi->s_freeclusters_counter); 842ac27a0ecSDave Kleikamp percpu_counter_destroy(&sbi->s_freeinodes_counter); 843ac27a0ecSDave Kleikamp percpu_counter_destroy(&sbi->s_dirs_counter); 84457042651STheodore Ts'o percpu_counter_destroy(&sbi->s_dirtyclusters_counter); 845ac27a0ecSDave Kleikamp brelse(sbi->s_sbh); 846ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 847ac27a0ecSDave Kleikamp for (i = 0; i < MAXQUOTAS; i++) 848ac27a0ecSDave Kleikamp kfree(sbi->s_qf_names[i]); 849ac27a0ecSDave Kleikamp #endif 850ac27a0ecSDave Kleikamp 851ac27a0ecSDave Kleikamp /* Debugging code just in case the in-memory inode orphan list 852ac27a0ecSDave Kleikamp * isn't empty. The on-disk one can be non-empty if we've 853ac27a0ecSDave Kleikamp * detected an error and taken the fs readonly, but the 854ac27a0ecSDave Kleikamp * in-memory list had better be clean by this point. */ 855ac27a0ecSDave Kleikamp if (!list_empty(&sbi->s_orphan)) 856ac27a0ecSDave Kleikamp dump_orphan_list(sb, sbi); 857ac27a0ecSDave Kleikamp J_ASSERT(list_empty(&sbi->s_orphan)); 858ac27a0ecSDave Kleikamp 859f98393a6SPeter Zijlstra invalidate_bdev(sb->s_bdev); 860ac27a0ecSDave Kleikamp if (sbi->journal_bdev && sbi->journal_bdev != sb->s_bdev) { 861ac27a0ecSDave Kleikamp /* 862ac27a0ecSDave Kleikamp * Invalidate the journal device's buffers. We don't want them 863ac27a0ecSDave Kleikamp * floating about in memory - the physical journal device may 864ac27a0ecSDave Kleikamp * hotswapped, and it breaks the `ro-after' testing code. 865ac27a0ecSDave Kleikamp */ 866ac27a0ecSDave Kleikamp sync_blockdev(sbi->journal_bdev); 867f98393a6SPeter Zijlstra invalidate_bdev(sbi->journal_bdev); 868617ba13bSMingming Cao ext4_blkdev_remove(sbi); 869ac27a0ecSDave Kleikamp } 870c5e06d10SJohann Lombardi if (sbi->s_mmp_tsk) 871c5e06d10SJohann Lombardi kthread_stop(sbi->s_mmp_tsk); 872ac27a0ecSDave Kleikamp sb->s_fs_info = NULL; 8733197ebdbSTheodore Ts'o /* 8743197ebdbSTheodore Ts'o * Now that we are completely done shutting down the 8753197ebdbSTheodore Ts'o * superblock, we need to actually destroy the kobject. 8763197ebdbSTheodore Ts'o */ 8773197ebdbSTheodore Ts'o unlock_super(sb); 8783197ebdbSTheodore Ts'o kobject_put(&sbi->s_kobj); 8793197ebdbSTheodore Ts'o wait_for_completion(&sbi->s_kobj_unregister); 880705895b6SPekka Enberg kfree(sbi->s_blockgroup_lock); 881ac27a0ecSDave Kleikamp kfree(sbi); 882ac27a0ecSDave Kleikamp } 883ac27a0ecSDave Kleikamp 884e18b890bSChristoph Lameter static struct kmem_cache *ext4_inode_cachep; 885ac27a0ecSDave Kleikamp 886ac27a0ecSDave Kleikamp /* 887ac27a0ecSDave Kleikamp * Called inside transaction, so use GFP_NOFS 888ac27a0ecSDave Kleikamp */ 889617ba13bSMingming Cao static struct inode *ext4_alloc_inode(struct super_block *sb) 890ac27a0ecSDave Kleikamp { 891617ba13bSMingming Cao struct ext4_inode_info *ei; 892ac27a0ecSDave Kleikamp 893e6b4f8daSChristoph Lameter ei = kmem_cache_alloc(ext4_inode_cachep, GFP_NOFS); 894ac27a0ecSDave Kleikamp if (!ei) 895ac27a0ecSDave Kleikamp return NULL; 8960b8e58a1SAndreas Dilger 897ac27a0ecSDave Kleikamp ei->vfs_inode.i_version = 1; 89891246c00SAneesh Kumar K.V ei->vfs_inode.i_data.writeback_index = 0; 899a86c6181SAlex Tomas memset(&ei->i_cached_extent, 0, sizeof(struct ext4_ext_cache)); 900c9de560dSAlex Tomas INIT_LIST_HEAD(&ei->i_prealloc_list); 901c9de560dSAlex Tomas spin_lock_init(&ei->i_prealloc_lock); 902d2a17637SMingming Cao ei->i_reserved_data_blocks = 0; 903d2a17637SMingming Cao ei->i_reserved_meta_blocks = 0; 904d2a17637SMingming Cao ei->i_allocated_meta_blocks = 0; 9059d0be502STheodore Ts'o ei->i_da_metadata_calc_len = 0; 906d2a17637SMingming Cao spin_lock_init(&(ei->i_block_reservation_lock)); 907a9e7f447SDmitry Monakhov #ifdef CONFIG_QUOTA 908a9e7f447SDmitry Monakhov ei->i_reserved_quota = 0; 909a9e7f447SDmitry Monakhov #endif 9108aefcd55STheodore Ts'o ei->jinode = NULL; 911c7064ef1SJiaying Zhang INIT_LIST_HEAD(&ei->i_completed_io_list); 912744692dcSJiaying Zhang spin_lock_init(&ei->i_completed_io_lock); 9138d5d02e6SMingming Cao ei->cur_aio_dio = NULL; 914b436b9beSJan Kara ei->i_sync_tid = 0; 915b436b9beSJan Kara ei->i_datasync_tid = 0; 916f7ad6d2eSTheodore Ts'o atomic_set(&ei->i_ioend_count, 0); 917e9e3bcecSEric Sandeen atomic_set(&ei->i_aiodio_unwritten, 0); 9180b8e58a1SAndreas Dilger 919ac27a0ecSDave Kleikamp return &ei->vfs_inode; 920ac27a0ecSDave Kleikamp } 921ac27a0ecSDave Kleikamp 9227ff9c073STheodore Ts'o static int ext4_drop_inode(struct inode *inode) 9237ff9c073STheodore Ts'o { 9247ff9c073STheodore Ts'o int drop = generic_drop_inode(inode); 9257ff9c073STheodore Ts'o 9267ff9c073STheodore Ts'o trace_ext4_drop_inode(inode, drop); 9277ff9c073STheodore Ts'o return drop; 9287ff9c073STheodore Ts'o } 9297ff9c073STheodore Ts'o 930fa0d7e3dSNick Piggin static void ext4_i_callback(struct rcu_head *head) 931fa0d7e3dSNick Piggin { 932fa0d7e3dSNick Piggin struct inode *inode = container_of(head, struct inode, i_rcu); 933fa0d7e3dSNick Piggin kmem_cache_free(ext4_inode_cachep, EXT4_I(inode)); 934fa0d7e3dSNick Piggin } 935fa0d7e3dSNick Piggin 936617ba13bSMingming Cao static void ext4_destroy_inode(struct inode *inode) 937ac27a0ecSDave Kleikamp { 9389f7dd93dSVasily Averin if (!list_empty(&(EXT4_I(inode)->i_orphan))) { 939b31e1552SEric Sandeen ext4_msg(inode->i_sb, KERN_ERR, 940b31e1552SEric Sandeen "Inode %lu (%p): orphan list check failed!", 941b31e1552SEric Sandeen inode->i_ino, EXT4_I(inode)); 9429f7dd93dSVasily Averin print_hex_dump(KERN_INFO, "", DUMP_PREFIX_ADDRESS, 16, 4, 9439f7dd93dSVasily Averin EXT4_I(inode), sizeof(struct ext4_inode_info), 9449f7dd93dSVasily Averin true); 9459f7dd93dSVasily Averin dump_stack(); 9469f7dd93dSVasily Averin } 947fa0d7e3dSNick Piggin call_rcu(&inode->i_rcu, ext4_i_callback); 948ac27a0ecSDave Kleikamp } 949ac27a0ecSDave Kleikamp 95051cc5068SAlexey Dobriyan static void init_once(void *foo) 951ac27a0ecSDave Kleikamp { 952617ba13bSMingming Cao struct ext4_inode_info *ei = (struct ext4_inode_info *) foo; 953ac27a0ecSDave Kleikamp 954ac27a0ecSDave Kleikamp INIT_LIST_HEAD(&ei->i_orphan); 95503010a33STheodore Ts'o #ifdef CONFIG_EXT4_FS_XATTR 956ac27a0ecSDave Kleikamp init_rwsem(&ei->xattr_sem); 957ac27a0ecSDave Kleikamp #endif 9580e855ac8SAneesh Kumar K.V init_rwsem(&ei->i_data_sem); 959ac27a0ecSDave Kleikamp inode_init_once(&ei->vfs_inode); 960ac27a0ecSDave Kleikamp } 961ac27a0ecSDave Kleikamp 962ac27a0ecSDave Kleikamp static int init_inodecache(void) 963ac27a0ecSDave Kleikamp { 964617ba13bSMingming Cao ext4_inode_cachep = kmem_cache_create("ext4_inode_cache", 965617ba13bSMingming Cao sizeof(struct ext4_inode_info), 966ac27a0ecSDave Kleikamp 0, (SLAB_RECLAIM_ACCOUNT| 967ac27a0ecSDave Kleikamp SLAB_MEM_SPREAD), 96820c2df83SPaul Mundt init_once); 969617ba13bSMingming Cao if (ext4_inode_cachep == NULL) 970ac27a0ecSDave Kleikamp return -ENOMEM; 971ac27a0ecSDave Kleikamp return 0; 972ac27a0ecSDave Kleikamp } 973ac27a0ecSDave Kleikamp 974ac27a0ecSDave Kleikamp static void destroy_inodecache(void) 975ac27a0ecSDave Kleikamp { 976617ba13bSMingming Cao kmem_cache_destroy(ext4_inode_cachep); 977ac27a0ecSDave Kleikamp } 978ac27a0ecSDave Kleikamp 9790930fcc1SAl Viro void ext4_clear_inode(struct inode *inode) 980ac27a0ecSDave Kleikamp { 9810930fcc1SAl Viro invalidate_inode_buffers(inode); 9820930fcc1SAl Viro end_writeback(inode); 9839f754758SChristoph Hellwig dquot_drop(inode); 984c2ea3fdeSTheodore Ts'o ext4_discard_preallocations(inode); 9858aefcd55STheodore Ts'o if (EXT4_I(inode)->jinode) { 9868aefcd55STheodore Ts'o jbd2_journal_release_jbd_inode(EXT4_JOURNAL(inode), 9878aefcd55STheodore Ts'o EXT4_I(inode)->jinode); 9888aefcd55STheodore Ts'o jbd2_free_inode(EXT4_I(inode)->jinode); 9898aefcd55STheodore Ts'o EXT4_I(inode)->jinode = NULL; 9908aefcd55STheodore Ts'o } 991ac27a0ecSDave Kleikamp } 992ac27a0ecSDave Kleikamp 9932b2d6d01STheodore Ts'o static inline void ext4_show_quota_options(struct seq_file *seq, 9942b2d6d01STheodore Ts'o struct super_block *sb) 995ac27a0ecSDave Kleikamp { 996ac27a0ecSDave Kleikamp #if defined(CONFIG_QUOTA) 997617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 998ac27a0ecSDave Kleikamp 9995a20bdfcSJan Kara if (sbi->s_jquota_fmt) { 10005a20bdfcSJan Kara char *fmtname = ""; 10015a20bdfcSJan Kara 10025a20bdfcSJan Kara switch (sbi->s_jquota_fmt) { 10035a20bdfcSJan Kara case QFMT_VFS_OLD: 10045a20bdfcSJan Kara fmtname = "vfsold"; 10055a20bdfcSJan Kara break; 10065a20bdfcSJan Kara case QFMT_VFS_V0: 10075a20bdfcSJan Kara fmtname = "vfsv0"; 10085a20bdfcSJan Kara break; 10095a20bdfcSJan Kara case QFMT_VFS_V1: 10105a20bdfcSJan Kara fmtname = "vfsv1"; 10115a20bdfcSJan Kara break; 10125a20bdfcSJan Kara } 10135a20bdfcSJan Kara seq_printf(seq, ",jqfmt=%s", fmtname); 10145a20bdfcSJan Kara } 1015ac27a0ecSDave Kleikamp 1016ac27a0ecSDave Kleikamp if (sbi->s_qf_names[USRQUOTA]) 1017ac27a0ecSDave Kleikamp seq_printf(seq, ",usrjquota=%s", sbi->s_qf_names[USRQUOTA]); 1018ac27a0ecSDave Kleikamp 1019ac27a0ecSDave Kleikamp if (sbi->s_qf_names[GRPQUOTA]) 1020ac27a0ecSDave Kleikamp seq_printf(seq, ",grpjquota=%s", sbi->s_qf_names[GRPQUOTA]); 1021ac27a0ecSDave Kleikamp 1022482a7425SDmitry Monakhov if (test_opt(sb, USRQUOTA)) 1023ac27a0ecSDave Kleikamp seq_puts(seq, ",usrquota"); 1024ac27a0ecSDave Kleikamp 1025482a7425SDmitry Monakhov if (test_opt(sb, GRPQUOTA)) 1026ac27a0ecSDave Kleikamp seq_puts(seq, ",grpquota"); 1027ac27a0ecSDave Kleikamp #endif 1028ac27a0ecSDave Kleikamp } 1029ac27a0ecSDave Kleikamp 1030d9c9bef1SMiklos Szeredi /* 1031d9c9bef1SMiklos Szeredi * Show an option if 1032d9c9bef1SMiklos Szeredi * - it's set to a non-default value OR 1033d9c9bef1SMiklos Szeredi * - if the per-sb default is different from the global default 1034d9c9bef1SMiklos Szeredi */ 1035617ba13bSMingming Cao static int ext4_show_options(struct seq_file *seq, struct vfsmount *vfs) 1036ac27a0ecSDave Kleikamp { 1037aa22df2cSAneesh Kumar K.V int def_errors; 1038aa22df2cSAneesh Kumar K.V unsigned long def_mount_opts; 1039ac27a0ecSDave Kleikamp struct super_block *sb = vfs->mnt_sb; 1040d9c9bef1SMiklos Szeredi struct ext4_sb_info *sbi = EXT4_SB(sb); 1041d9c9bef1SMiklos Szeredi struct ext4_super_block *es = sbi->s_es; 1042d9c9bef1SMiklos Szeredi 1043d9c9bef1SMiklos Szeredi def_mount_opts = le32_to_cpu(es->s_default_mount_opts); 1044aa22df2cSAneesh Kumar K.V def_errors = le16_to_cpu(es->s_errors); 1045d9c9bef1SMiklos Szeredi 1046d9c9bef1SMiklos Szeredi if (sbi->s_sb_block != 1) 1047d9c9bef1SMiklos Szeredi seq_printf(seq, ",sb=%llu", sbi->s_sb_block); 1048d9c9bef1SMiklos Szeredi if (test_opt(sb, MINIX_DF)) 1049d9c9bef1SMiklos Szeredi seq_puts(seq, ",minixdf"); 1050aa22df2cSAneesh Kumar K.V if (test_opt(sb, GRPID) && !(def_mount_opts & EXT4_DEFM_BSDGROUPS)) 1051d9c9bef1SMiklos Szeredi seq_puts(seq, ",grpid"); 1052d9c9bef1SMiklos Szeredi if (!test_opt(sb, GRPID) && (def_mount_opts & EXT4_DEFM_BSDGROUPS)) 1053d9c9bef1SMiklos Szeredi seq_puts(seq, ",nogrpid"); 1054d9c9bef1SMiklos Szeredi if (sbi->s_resuid != EXT4_DEF_RESUID || 1055d9c9bef1SMiklos Szeredi le16_to_cpu(es->s_def_resuid) != EXT4_DEF_RESUID) { 1056d9c9bef1SMiklos Szeredi seq_printf(seq, ",resuid=%u", sbi->s_resuid); 1057d9c9bef1SMiklos Szeredi } 1058d9c9bef1SMiklos Szeredi if (sbi->s_resgid != EXT4_DEF_RESGID || 1059d9c9bef1SMiklos Szeredi le16_to_cpu(es->s_def_resgid) != EXT4_DEF_RESGID) { 1060d9c9bef1SMiklos Szeredi seq_printf(seq, ",resgid=%u", sbi->s_resgid); 1061d9c9bef1SMiklos Szeredi } 1062bb4f397aSAneesh Kumar K.V if (test_opt(sb, ERRORS_RO)) { 1063d9c9bef1SMiklos Szeredi if (def_errors == EXT4_ERRORS_PANIC || 1064bb4f397aSAneesh Kumar K.V def_errors == EXT4_ERRORS_CONTINUE) { 1065d9c9bef1SMiklos Szeredi seq_puts(seq, ",errors=remount-ro"); 1066bb4f397aSAneesh Kumar K.V } 1067bb4f397aSAneesh Kumar K.V } 1068aa22df2cSAneesh Kumar K.V if (test_opt(sb, ERRORS_CONT) && def_errors != EXT4_ERRORS_CONTINUE) 1069bb4f397aSAneesh Kumar K.V seq_puts(seq, ",errors=continue"); 1070aa22df2cSAneesh Kumar K.V if (test_opt(sb, ERRORS_PANIC) && def_errors != EXT4_ERRORS_PANIC) 1071d9c9bef1SMiklos Szeredi seq_puts(seq, ",errors=panic"); 1072aa22df2cSAneesh Kumar K.V if (test_opt(sb, NO_UID32) && !(def_mount_opts & EXT4_DEFM_UID16)) 1073d9c9bef1SMiklos Szeredi seq_puts(seq, ",nouid32"); 1074aa22df2cSAneesh Kumar K.V if (test_opt(sb, DEBUG) && !(def_mount_opts & EXT4_DEFM_DEBUG)) 1075d9c9bef1SMiklos Szeredi seq_puts(seq, ",debug"); 107603010a33STheodore Ts'o #ifdef CONFIG_EXT4_FS_XATTR 1077ea663336SEric Sandeen if (test_opt(sb, XATTR_USER)) 1078d9c9bef1SMiklos Szeredi seq_puts(seq, ",user_xattr"); 1079ea663336SEric Sandeen if (!test_opt(sb, XATTR_USER)) 1080d9c9bef1SMiklos Szeredi seq_puts(seq, ",nouser_xattr"); 1081d9c9bef1SMiklos Szeredi #endif 108203010a33STheodore Ts'o #ifdef CONFIG_EXT4_FS_POSIX_ACL 1083aa22df2cSAneesh Kumar K.V if (test_opt(sb, POSIX_ACL) && !(def_mount_opts & EXT4_DEFM_ACL)) 1084d9c9bef1SMiklos Szeredi seq_puts(seq, ",acl"); 1085d9c9bef1SMiklos Szeredi if (!test_opt(sb, POSIX_ACL) && (def_mount_opts & EXT4_DEFM_ACL)) 1086d9c9bef1SMiklos Szeredi seq_puts(seq, ",noacl"); 1087d9c9bef1SMiklos Szeredi #endif 108830773840STheodore Ts'o if (sbi->s_commit_interval != JBD2_DEFAULT_MAX_COMMIT_AGE*HZ) { 1089d9c9bef1SMiklos Szeredi seq_printf(seq, ",commit=%u", 1090d9c9bef1SMiklos Szeredi (unsigned) (sbi->s_commit_interval / HZ)); 1091d9c9bef1SMiklos Szeredi } 109230773840STheodore Ts'o if (sbi->s_min_batch_time != EXT4_DEF_MIN_BATCH_TIME) { 109330773840STheodore Ts'o seq_printf(seq, ",min_batch_time=%u", 109430773840STheodore Ts'o (unsigned) sbi->s_min_batch_time); 109530773840STheodore Ts'o } 109630773840STheodore Ts'o if (sbi->s_max_batch_time != EXT4_DEF_MAX_BATCH_TIME) { 109730773840STheodore Ts'o seq_printf(seq, ",max_batch_time=%u", 109830773840STheodore Ts'o (unsigned) sbi->s_min_batch_time); 109930773840STheodore Ts'o } 110030773840STheodore Ts'o 1101571640caSEric Sandeen /* 1102571640caSEric Sandeen * We're changing the default of barrier mount option, so 1103571640caSEric Sandeen * let's always display its mount state so it's clear what its 1104571640caSEric Sandeen * status is. 1105571640caSEric Sandeen */ 1106571640caSEric Sandeen seq_puts(seq, ",barrier="); 1107571640caSEric Sandeen seq_puts(seq, test_opt(sb, BARRIER) ? "1" : "0"); 1108cd0b6a39STheodore Ts'o if (test_opt(sb, JOURNAL_ASYNC_COMMIT)) 1109cd0b6a39STheodore Ts'o seq_puts(seq, ",journal_async_commit"); 111039a4badeSJan Kara else if (test_opt(sb, JOURNAL_CHECKSUM)) 111139a4badeSJan Kara seq_puts(seq, ",journal_checksum"); 111225ec56b5SJean Noel Cordenner if (test_opt(sb, I_VERSION)) 111325ec56b5SJean Noel Cordenner seq_puts(seq, ",i_version"); 11148b67f04aSTheodore Ts'o if (!test_opt(sb, DELALLOC) && 11158b67f04aSTheodore Ts'o !(def_mount_opts & EXT4_DEFM_NODELALLOC)) 1116dd919b98SAneesh Kumar K.V seq_puts(seq, ",nodelalloc"); 1117dd919b98SAneesh Kumar K.V 11186fd7a467STheodore Ts'o if (!test_opt(sb, MBLK_IO_SUBMIT)) 11196fd7a467STheodore Ts'o seq_puts(seq, ",nomblk_io_submit"); 1120cb45bbe4SMiklos Szeredi if (sbi->s_stripe) 1121cb45bbe4SMiklos Szeredi seq_printf(seq, ",stripe=%lu", sbi->s_stripe); 1122aa22df2cSAneesh Kumar K.V /* 1123aa22df2cSAneesh Kumar K.V * journal mode get enabled in different ways 1124aa22df2cSAneesh Kumar K.V * So just print the value even if we didn't specify it 1125aa22df2cSAneesh Kumar K.V */ 1126617ba13bSMingming Cao if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) 1127ac27a0ecSDave Kleikamp seq_puts(seq, ",data=journal"); 1128617ba13bSMingming Cao else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA) 1129ac27a0ecSDave Kleikamp seq_puts(seq, ",data=ordered"); 1130617ba13bSMingming Cao else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_WRITEBACK_DATA) 1131ac27a0ecSDave Kleikamp seq_puts(seq, ",data=writeback"); 1132ac27a0ecSDave Kleikamp 1133240799cdSTheodore Ts'o if (sbi->s_inode_readahead_blks != EXT4_DEF_INODE_READAHEAD_BLKS) 1134240799cdSTheodore Ts'o seq_printf(seq, ",inode_readahead_blks=%u", 1135240799cdSTheodore Ts'o sbi->s_inode_readahead_blks); 1136240799cdSTheodore Ts'o 11375bf5683aSHidehiro Kawai if (test_opt(sb, DATA_ERR_ABORT)) 11385bf5683aSHidehiro Kawai seq_puts(seq, ",data_err=abort"); 11395bf5683aSHidehiro Kawai 1140afd4672dSTheodore Ts'o if (test_opt(sb, NO_AUTO_DA_ALLOC)) 114106705bffSTheodore Ts'o seq_puts(seq, ",noauto_da_alloc"); 1142afd4672dSTheodore Ts'o 11438b67f04aSTheodore Ts'o if (test_opt(sb, DISCARD) && !(def_mount_opts & EXT4_DEFM_DISCARD)) 11445328e635SEric Sandeen seq_puts(seq, ",discard"); 11455328e635SEric Sandeen 1146e3bb52aeSEric Sandeen if (test_opt(sb, NOLOAD)) 1147e3bb52aeSEric Sandeen seq_puts(seq, ",norecovery"); 1148e3bb52aeSEric Sandeen 1149744692dcSJiaying Zhang if (test_opt(sb, DIOREAD_NOLOCK)) 1150744692dcSJiaying Zhang seq_puts(seq, ",dioread_nolock"); 1151744692dcSJiaying Zhang 11528b67f04aSTheodore Ts'o if (test_opt(sb, BLOCK_VALIDITY) && 11538b67f04aSTheodore Ts'o !(def_mount_opts & EXT4_DEFM_BLOCK_VALIDITY)) 11548b67f04aSTheodore Ts'o seq_puts(seq, ",block_validity"); 11558b67f04aSTheodore Ts'o 1156bfff6873SLukas Czerner if (!test_opt(sb, INIT_INODE_TABLE)) 1157fc6cb1cdSTheodore Ts'o seq_puts(seq, ",noinit_itable"); 115851ce6511SLukas Czerner else if (sbi->s_li_wait_mult != EXT4_DEF_LI_WAIT_MULT) 1159fc6cb1cdSTheodore Ts'o seq_printf(seq, ",init_itable=%u", 1160bfff6873SLukas Czerner (unsigned) sbi->s_li_wait_mult); 1161bfff6873SLukas Czerner 1162617ba13bSMingming Cao ext4_show_quota_options(seq, sb); 11630b8e58a1SAndreas Dilger 1164ac27a0ecSDave Kleikamp return 0; 1165ac27a0ecSDave Kleikamp } 1166ac27a0ecSDave Kleikamp 11671b961ac0SChristoph Hellwig static struct inode *ext4_nfs_get_inode(struct super_block *sb, 11681b961ac0SChristoph Hellwig u64 ino, u32 generation) 1169ac27a0ecSDave Kleikamp { 1170ac27a0ecSDave Kleikamp struct inode *inode; 1171ac27a0ecSDave Kleikamp 1172617ba13bSMingming Cao if (ino < EXT4_FIRST_INO(sb) && ino != EXT4_ROOT_INO) 1173ac27a0ecSDave Kleikamp return ERR_PTR(-ESTALE); 1174617ba13bSMingming Cao if (ino > le32_to_cpu(EXT4_SB(sb)->s_es->s_inodes_count)) 1175ac27a0ecSDave Kleikamp return ERR_PTR(-ESTALE); 1176ac27a0ecSDave Kleikamp 1177ac27a0ecSDave Kleikamp /* iget isn't really right if the inode is currently unallocated!! 1178ac27a0ecSDave Kleikamp * 1179617ba13bSMingming Cao * ext4_read_inode will return a bad_inode if the inode had been 1180ac27a0ecSDave Kleikamp * deleted, so we should be safe. 1181ac27a0ecSDave Kleikamp * 1182ac27a0ecSDave Kleikamp * Currently we don't know the generation for parent directory, so 1183ac27a0ecSDave Kleikamp * a generation of 0 means "accept any" 1184ac27a0ecSDave Kleikamp */ 11851d1fe1eeSDavid Howells inode = ext4_iget(sb, ino); 11861d1fe1eeSDavid Howells if (IS_ERR(inode)) 11871d1fe1eeSDavid Howells return ERR_CAST(inode); 11881d1fe1eeSDavid Howells if (generation && inode->i_generation != generation) { 1189ac27a0ecSDave Kleikamp iput(inode); 1190ac27a0ecSDave Kleikamp return ERR_PTR(-ESTALE); 1191ac27a0ecSDave Kleikamp } 11921b961ac0SChristoph Hellwig 11931b961ac0SChristoph Hellwig return inode; 1194ac27a0ecSDave Kleikamp } 11951b961ac0SChristoph Hellwig 11961b961ac0SChristoph Hellwig static struct dentry *ext4_fh_to_dentry(struct super_block *sb, struct fid *fid, 11971b961ac0SChristoph Hellwig int fh_len, int fh_type) 11981b961ac0SChristoph Hellwig { 11991b961ac0SChristoph Hellwig return generic_fh_to_dentry(sb, fid, fh_len, fh_type, 12001b961ac0SChristoph Hellwig ext4_nfs_get_inode); 12011b961ac0SChristoph Hellwig } 12021b961ac0SChristoph Hellwig 12031b961ac0SChristoph Hellwig static struct dentry *ext4_fh_to_parent(struct super_block *sb, struct fid *fid, 12041b961ac0SChristoph Hellwig int fh_len, int fh_type) 12051b961ac0SChristoph Hellwig { 12061b961ac0SChristoph Hellwig return generic_fh_to_parent(sb, fid, fh_len, fh_type, 12071b961ac0SChristoph Hellwig ext4_nfs_get_inode); 1208ac27a0ecSDave Kleikamp } 1209ac27a0ecSDave Kleikamp 1210c39a7f84SToshiyuki Okajima /* 1211c39a7f84SToshiyuki Okajima * Try to release metadata pages (indirect blocks, directories) which are 1212c39a7f84SToshiyuki Okajima * mapped via the block device. Since these pages could have journal heads 1213c39a7f84SToshiyuki Okajima * which would prevent try_to_free_buffers() from freeing them, we must use 1214c39a7f84SToshiyuki Okajima * jbd2 layer's try_to_free_buffers() function to release them. 1215c39a7f84SToshiyuki Okajima */ 12160b8e58a1SAndreas Dilger static int bdev_try_to_free_page(struct super_block *sb, struct page *page, 12170b8e58a1SAndreas Dilger gfp_t wait) 1218c39a7f84SToshiyuki Okajima { 1219c39a7f84SToshiyuki Okajima journal_t *journal = EXT4_SB(sb)->s_journal; 1220c39a7f84SToshiyuki Okajima 1221c39a7f84SToshiyuki Okajima WARN_ON(PageChecked(page)); 1222c39a7f84SToshiyuki Okajima if (!page_has_buffers(page)) 1223c39a7f84SToshiyuki Okajima return 0; 1224c39a7f84SToshiyuki Okajima if (journal) 1225c39a7f84SToshiyuki Okajima return jbd2_journal_try_to_free_buffers(journal, page, 1226c39a7f84SToshiyuki Okajima wait & ~__GFP_WAIT); 1227c39a7f84SToshiyuki Okajima return try_to_free_buffers(page); 1228c39a7f84SToshiyuki Okajima } 1229c39a7f84SToshiyuki Okajima 1230ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1231ac27a0ecSDave Kleikamp #define QTYPE2NAME(t) ((t) == USRQUOTA ? "user" : "group") 1232ac27a0ecSDave Kleikamp #define QTYPE2MOPT(on, t) ((t) == USRQUOTA?((on)##USRJQUOTA):((on)##GRPJQUOTA)) 1233ac27a0ecSDave Kleikamp 1234617ba13bSMingming Cao static int ext4_write_dquot(struct dquot *dquot); 1235617ba13bSMingming Cao static int ext4_acquire_dquot(struct dquot *dquot); 1236617ba13bSMingming Cao static int ext4_release_dquot(struct dquot *dquot); 1237617ba13bSMingming Cao static int ext4_mark_dquot_dirty(struct dquot *dquot); 1238617ba13bSMingming Cao static int ext4_write_info(struct super_block *sb, int type); 12396f28e087SJan Kara static int ext4_quota_on(struct super_block *sb, int type, int format_id, 1240f00c9e44SJan Kara struct path *path); 1241ca0e05e4SDmitry Monakhov static int ext4_quota_off(struct super_block *sb, int type); 1242617ba13bSMingming Cao static int ext4_quota_on_mount(struct super_block *sb, int type); 1243617ba13bSMingming Cao static ssize_t ext4_quota_read(struct super_block *sb, int type, char *data, 1244ac27a0ecSDave Kleikamp size_t len, loff_t off); 1245617ba13bSMingming Cao static ssize_t ext4_quota_write(struct super_block *sb, int type, 1246ac27a0ecSDave Kleikamp const char *data, size_t len, loff_t off); 1247ac27a0ecSDave Kleikamp 124861e225dcSAlexey Dobriyan static const struct dquot_operations ext4_quota_operations = { 124960e58e0fSMingming Cao .get_reserved_space = ext4_get_reserved_space, 1250617ba13bSMingming Cao .write_dquot = ext4_write_dquot, 1251617ba13bSMingming Cao .acquire_dquot = ext4_acquire_dquot, 1252617ba13bSMingming Cao .release_dquot = ext4_release_dquot, 1253617ba13bSMingming Cao .mark_dirty = ext4_mark_dquot_dirty, 1254a5b5ee32SJan Kara .write_info = ext4_write_info, 1255a5b5ee32SJan Kara .alloc_dquot = dquot_alloc, 1256a5b5ee32SJan Kara .destroy_dquot = dquot_destroy, 1257ac27a0ecSDave Kleikamp }; 1258ac27a0ecSDave Kleikamp 12590d54b217SAlexey Dobriyan static const struct quotactl_ops ext4_qctl_operations = { 1260617ba13bSMingming Cao .quota_on = ext4_quota_on, 1261ca0e05e4SDmitry Monakhov .quota_off = ext4_quota_off, 1262287a8095SChristoph Hellwig .quota_sync = dquot_quota_sync, 1263287a8095SChristoph Hellwig .get_info = dquot_get_dqinfo, 1264287a8095SChristoph Hellwig .set_info = dquot_set_dqinfo, 1265287a8095SChristoph Hellwig .get_dqblk = dquot_get_dqblk, 1266287a8095SChristoph Hellwig .set_dqblk = dquot_set_dqblk 1267ac27a0ecSDave Kleikamp }; 1268ac27a0ecSDave Kleikamp #endif 1269ac27a0ecSDave Kleikamp 1270ee9b6d61SJosef 'Jeff' Sipek static const struct super_operations ext4_sops = { 1271617ba13bSMingming Cao .alloc_inode = ext4_alloc_inode, 1272617ba13bSMingming Cao .destroy_inode = ext4_destroy_inode, 1273617ba13bSMingming Cao .write_inode = ext4_write_inode, 1274617ba13bSMingming Cao .dirty_inode = ext4_dirty_inode, 12757ff9c073STheodore Ts'o .drop_inode = ext4_drop_inode, 12760930fcc1SAl Viro .evict_inode = ext4_evict_inode, 1277617ba13bSMingming Cao .put_super = ext4_put_super, 1278617ba13bSMingming Cao .sync_fs = ext4_sync_fs, 1279c4be0c1dSTakashi Sato .freeze_fs = ext4_freeze, 1280c4be0c1dSTakashi Sato .unfreeze_fs = ext4_unfreeze, 1281617ba13bSMingming Cao .statfs = ext4_statfs, 1282617ba13bSMingming Cao .remount_fs = ext4_remount, 1283617ba13bSMingming Cao .show_options = ext4_show_options, 1284ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1285617ba13bSMingming Cao .quota_read = ext4_quota_read, 1286617ba13bSMingming Cao .quota_write = ext4_quota_write, 1287ac27a0ecSDave Kleikamp #endif 1288c39a7f84SToshiyuki Okajima .bdev_try_to_free_page = bdev_try_to_free_page, 1289ac27a0ecSDave Kleikamp }; 1290ac27a0ecSDave Kleikamp 12919ca92389STheodore Ts'o static const struct super_operations ext4_nojournal_sops = { 12929ca92389STheodore Ts'o .alloc_inode = ext4_alloc_inode, 12939ca92389STheodore Ts'o .destroy_inode = ext4_destroy_inode, 12949ca92389STheodore Ts'o .write_inode = ext4_write_inode, 12959ca92389STheodore Ts'o .dirty_inode = ext4_dirty_inode, 12967ff9c073STheodore Ts'o .drop_inode = ext4_drop_inode, 12970930fcc1SAl Viro .evict_inode = ext4_evict_inode, 12989ca92389STheodore Ts'o .write_super = ext4_write_super, 12999ca92389STheodore Ts'o .put_super = ext4_put_super, 13009ca92389STheodore Ts'o .statfs = ext4_statfs, 13019ca92389STheodore Ts'o .remount_fs = ext4_remount, 13029ca92389STheodore Ts'o .show_options = ext4_show_options, 13039ca92389STheodore Ts'o #ifdef CONFIG_QUOTA 13049ca92389STheodore Ts'o .quota_read = ext4_quota_read, 13059ca92389STheodore Ts'o .quota_write = ext4_quota_write, 13069ca92389STheodore Ts'o #endif 13079ca92389STheodore Ts'o .bdev_try_to_free_page = bdev_try_to_free_page, 13089ca92389STheodore Ts'o }; 13099ca92389STheodore Ts'o 131039655164SChristoph Hellwig static const struct export_operations ext4_export_ops = { 13111b961ac0SChristoph Hellwig .fh_to_dentry = ext4_fh_to_dentry, 13121b961ac0SChristoph Hellwig .fh_to_parent = ext4_fh_to_parent, 1313617ba13bSMingming Cao .get_parent = ext4_get_parent, 1314ac27a0ecSDave Kleikamp }; 1315ac27a0ecSDave Kleikamp 1316ac27a0ecSDave Kleikamp enum { 1317ac27a0ecSDave Kleikamp Opt_bsd_df, Opt_minix_df, Opt_grpid, Opt_nogrpid, 1318ac27a0ecSDave Kleikamp Opt_resgid, Opt_resuid, Opt_sb, Opt_err_cont, Opt_err_panic, Opt_err_ro, 131901436ef2STheodore Ts'o Opt_nouid32, Opt_debug, Opt_oldalloc, Opt_orlov, 1320ac27a0ecSDave Kleikamp Opt_user_xattr, Opt_nouser_xattr, Opt_acl, Opt_noacl, 132106705bffSTheodore Ts'o Opt_auto_da_alloc, Opt_noauto_da_alloc, Opt_noload, Opt_nobh, Opt_bh, 132230773840STheodore Ts'o Opt_commit, Opt_min_batch_time, Opt_max_batch_time, 1323c3191067STheodore Ts'o Opt_journal_update, Opt_journal_dev, 1324818d276cSGirish Shilamkar Opt_journal_checksum, Opt_journal_async_commit, 1325ac27a0ecSDave Kleikamp Opt_abort, Opt_data_journal, Opt_data_ordered, Opt_data_writeback, 1326296c355cSTheodore Ts'o Opt_data_err_abort, Opt_data_err_ignore, 1327ac27a0ecSDave Kleikamp Opt_usrjquota, Opt_grpjquota, Opt_offusrjquota, Opt_offgrpjquota, 13285a20bdfcSJan Kara Opt_jqfmt_vfsold, Opt_jqfmt_vfsv0, Opt_jqfmt_vfsv1, Opt_quota, 13295a20bdfcSJan Kara Opt_noquota, Opt_ignore, Opt_barrier, Opt_nobarrier, Opt_err, 13305a20bdfcSJan Kara Opt_resize, Opt_usrquota, Opt_grpquota, Opt_i_version, 13311449032bSTheodore Ts'o Opt_stripe, Opt_delalloc, Opt_nodelalloc, Opt_mblk_io_submit, 13321449032bSTheodore Ts'o Opt_nomblk_io_submit, Opt_block_validity, Opt_noblock_validity, 13335328e635SEric Sandeen Opt_inode_readahead_blks, Opt_journal_ioprio, 1334744692dcSJiaying Zhang Opt_dioread_nolock, Opt_dioread_lock, 1335fc6cb1cdSTheodore Ts'o Opt_discard, Opt_nodiscard, Opt_init_itable, Opt_noinit_itable, 1336ac27a0ecSDave Kleikamp }; 1337ac27a0ecSDave Kleikamp 1338a447c093SSteven Whitehouse static const match_table_t tokens = { 1339ac27a0ecSDave Kleikamp {Opt_bsd_df, "bsddf"}, 1340ac27a0ecSDave Kleikamp {Opt_minix_df, "minixdf"}, 1341ac27a0ecSDave Kleikamp {Opt_grpid, "grpid"}, 1342ac27a0ecSDave Kleikamp {Opt_grpid, "bsdgroups"}, 1343ac27a0ecSDave Kleikamp {Opt_nogrpid, "nogrpid"}, 1344ac27a0ecSDave Kleikamp {Opt_nogrpid, "sysvgroups"}, 1345ac27a0ecSDave Kleikamp {Opt_resgid, "resgid=%u"}, 1346ac27a0ecSDave Kleikamp {Opt_resuid, "resuid=%u"}, 1347ac27a0ecSDave Kleikamp {Opt_sb, "sb=%u"}, 1348ac27a0ecSDave Kleikamp {Opt_err_cont, "errors=continue"}, 1349ac27a0ecSDave Kleikamp {Opt_err_panic, "errors=panic"}, 1350ac27a0ecSDave Kleikamp {Opt_err_ro, "errors=remount-ro"}, 1351ac27a0ecSDave Kleikamp {Opt_nouid32, "nouid32"}, 1352ac27a0ecSDave Kleikamp {Opt_debug, "debug"}, 1353ac27a0ecSDave Kleikamp {Opt_oldalloc, "oldalloc"}, 1354ac27a0ecSDave Kleikamp {Opt_orlov, "orlov"}, 1355ac27a0ecSDave Kleikamp {Opt_user_xattr, "user_xattr"}, 1356ac27a0ecSDave Kleikamp {Opt_nouser_xattr, "nouser_xattr"}, 1357ac27a0ecSDave Kleikamp {Opt_acl, "acl"}, 1358ac27a0ecSDave Kleikamp {Opt_noacl, "noacl"}, 1359ac27a0ecSDave Kleikamp {Opt_noload, "noload"}, 1360e3bb52aeSEric Sandeen {Opt_noload, "norecovery"}, 1361ac27a0ecSDave Kleikamp {Opt_nobh, "nobh"}, 1362ac27a0ecSDave Kleikamp {Opt_bh, "bh"}, 1363ac27a0ecSDave Kleikamp {Opt_commit, "commit=%u"}, 136430773840STheodore Ts'o {Opt_min_batch_time, "min_batch_time=%u"}, 136530773840STheodore Ts'o {Opt_max_batch_time, "max_batch_time=%u"}, 1366ac27a0ecSDave Kleikamp {Opt_journal_update, "journal=update"}, 1367ac27a0ecSDave Kleikamp {Opt_journal_dev, "journal_dev=%u"}, 1368818d276cSGirish Shilamkar {Opt_journal_checksum, "journal_checksum"}, 1369818d276cSGirish Shilamkar {Opt_journal_async_commit, "journal_async_commit"}, 1370ac27a0ecSDave Kleikamp {Opt_abort, "abort"}, 1371ac27a0ecSDave Kleikamp {Opt_data_journal, "data=journal"}, 1372ac27a0ecSDave Kleikamp {Opt_data_ordered, "data=ordered"}, 1373ac27a0ecSDave Kleikamp {Opt_data_writeback, "data=writeback"}, 13745bf5683aSHidehiro Kawai {Opt_data_err_abort, "data_err=abort"}, 13755bf5683aSHidehiro Kawai {Opt_data_err_ignore, "data_err=ignore"}, 1376ac27a0ecSDave Kleikamp {Opt_offusrjquota, "usrjquota="}, 1377ac27a0ecSDave Kleikamp {Opt_usrjquota, "usrjquota=%s"}, 1378ac27a0ecSDave Kleikamp {Opt_offgrpjquota, "grpjquota="}, 1379ac27a0ecSDave Kleikamp {Opt_grpjquota, "grpjquota=%s"}, 1380ac27a0ecSDave Kleikamp {Opt_jqfmt_vfsold, "jqfmt=vfsold"}, 1381ac27a0ecSDave Kleikamp {Opt_jqfmt_vfsv0, "jqfmt=vfsv0"}, 13825a20bdfcSJan Kara {Opt_jqfmt_vfsv1, "jqfmt=vfsv1"}, 1383ac27a0ecSDave Kleikamp {Opt_grpquota, "grpquota"}, 1384ac27a0ecSDave Kleikamp {Opt_noquota, "noquota"}, 1385ac27a0ecSDave Kleikamp {Opt_quota, "quota"}, 1386ac27a0ecSDave Kleikamp {Opt_usrquota, "usrquota"}, 1387ac27a0ecSDave Kleikamp {Opt_barrier, "barrier=%u"}, 138806705bffSTheodore Ts'o {Opt_barrier, "barrier"}, 138906705bffSTheodore Ts'o {Opt_nobarrier, "nobarrier"}, 139025ec56b5SJean Noel Cordenner {Opt_i_version, "i_version"}, 1391c9de560dSAlex Tomas {Opt_stripe, "stripe=%u"}, 1392ac27a0ecSDave Kleikamp {Opt_resize, "resize"}, 139364769240SAlex Tomas {Opt_delalloc, "delalloc"}, 1394dd919b98SAneesh Kumar K.V {Opt_nodelalloc, "nodelalloc"}, 13951449032bSTheodore Ts'o {Opt_mblk_io_submit, "mblk_io_submit"}, 13961449032bSTheodore Ts'o {Opt_nomblk_io_submit, "nomblk_io_submit"}, 13976fd058f7STheodore Ts'o {Opt_block_validity, "block_validity"}, 13986fd058f7STheodore Ts'o {Opt_noblock_validity, "noblock_validity"}, 1399240799cdSTheodore Ts'o {Opt_inode_readahead_blks, "inode_readahead_blks=%u"}, 1400b3881f74STheodore Ts'o {Opt_journal_ioprio, "journal_ioprio=%u"}, 1401afd4672dSTheodore Ts'o {Opt_auto_da_alloc, "auto_da_alloc=%u"}, 140206705bffSTheodore Ts'o {Opt_auto_da_alloc, "auto_da_alloc"}, 140306705bffSTheodore Ts'o {Opt_noauto_da_alloc, "noauto_da_alloc"}, 1404744692dcSJiaying Zhang {Opt_dioread_nolock, "dioread_nolock"}, 1405744692dcSJiaying Zhang {Opt_dioread_lock, "dioread_lock"}, 14065328e635SEric Sandeen {Opt_discard, "discard"}, 14075328e635SEric Sandeen {Opt_nodiscard, "nodiscard"}, 1408fc6cb1cdSTheodore Ts'o {Opt_init_itable, "init_itable=%u"}, 1409fc6cb1cdSTheodore Ts'o {Opt_init_itable, "init_itable"}, 1410fc6cb1cdSTheodore Ts'o {Opt_noinit_itable, "noinit_itable"}, 1411f3f12faaSJosef Bacik {Opt_err, NULL}, 1412ac27a0ecSDave Kleikamp }; 1413ac27a0ecSDave Kleikamp 1414617ba13bSMingming Cao static ext4_fsblk_t get_sb_block(void **data) 1415ac27a0ecSDave Kleikamp { 1416617ba13bSMingming Cao ext4_fsblk_t sb_block; 1417ac27a0ecSDave Kleikamp char *options = (char *) *data; 1418ac27a0ecSDave Kleikamp 1419ac27a0ecSDave Kleikamp if (!options || strncmp(options, "sb=", 3) != 0) 1420ac27a0ecSDave Kleikamp return 1; /* Default location */ 14210b8e58a1SAndreas Dilger 1422ac27a0ecSDave Kleikamp options += 3; 14230b8e58a1SAndreas Dilger /* TODO: use simple_strtoll with >32bit ext4 */ 1424ac27a0ecSDave Kleikamp sb_block = simple_strtoul(options, &options, 0); 1425ac27a0ecSDave Kleikamp if (*options && *options != ',') { 14264776004fSTheodore Ts'o printk(KERN_ERR "EXT4-fs: Invalid sb specification: %s\n", 1427ac27a0ecSDave Kleikamp (char *) *data); 1428ac27a0ecSDave Kleikamp return 1; 1429ac27a0ecSDave Kleikamp } 1430ac27a0ecSDave Kleikamp if (*options == ',') 1431ac27a0ecSDave Kleikamp options++; 1432ac27a0ecSDave Kleikamp *data = (void *) options; 14330b8e58a1SAndreas Dilger 1434ac27a0ecSDave Kleikamp return sb_block; 1435ac27a0ecSDave Kleikamp } 1436ac27a0ecSDave Kleikamp 1437b3881f74STheodore Ts'o #define DEFAULT_JOURNAL_IOPRIO (IOPRIO_PRIO_VALUE(IOPRIO_CLASS_BE, 3)) 1438437ca0fdSDmitry Monakhov static char deprecated_msg[] = "Mount option \"%s\" will be removed by %s\n" 1439437ca0fdSDmitry Monakhov "Contact linux-ext4@vger.kernel.org if you think we should keep it.\n"; 1440b3881f74STheodore Ts'o 144156c50f11SDmitry Monakhov #ifdef CONFIG_QUOTA 144256c50f11SDmitry Monakhov static int set_qf_name(struct super_block *sb, int qtype, substring_t *args) 144356c50f11SDmitry Monakhov { 144456c50f11SDmitry Monakhov struct ext4_sb_info *sbi = EXT4_SB(sb); 144556c50f11SDmitry Monakhov char *qname; 144656c50f11SDmitry Monakhov 144756c50f11SDmitry Monakhov if (sb_any_quota_loaded(sb) && 144856c50f11SDmitry Monakhov !sbi->s_qf_names[qtype]) { 144956c50f11SDmitry Monakhov ext4_msg(sb, KERN_ERR, 145056c50f11SDmitry Monakhov "Cannot change journaled " 145156c50f11SDmitry Monakhov "quota options when quota turned on"); 145256c50f11SDmitry Monakhov return 0; 145356c50f11SDmitry Monakhov } 145456c50f11SDmitry Monakhov qname = match_strdup(args); 145556c50f11SDmitry Monakhov if (!qname) { 145656c50f11SDmitry Monakhov ext4_msg(sb, KERN_ERR, 145756c50f11SDmitry Monakhov "Not enough memory for storing quotafile name"); 145856c50f11SDmitry Monakhov return 0; 145956c50f11SDmitry Monakhov } 146056c50f11SDmitry Monakhov if (sbi->s_qf_names[qtype] && 146156c50f11SDmitry Monakhov strcmp(sbi->s_qf_names[qtype], qname)) { 146256c50f11SDmitry Monakhov ext4_msg(sb, KERN_ERR, 146356c50f11SDmitry Monakhov "%s quota file already specified", QTYPE2NAME(qtype)); 146456c50f11SDmitry Monakhov kfree(qname); 146556c50f11SDmitry Monakhov return 0; 146656c50f11SDmitry Monakhov } 146756c50f11SDmitry Monakhov sbi->s_qf_names[qtype] = qname; 146856c50f11SDmitry Monakhov if (strchr(sbi->s_qf_names[qtype], '/')) { 146956c50f11SDmitry Monakhov ext4_msg(sb, KERN_ERR, 147056c50f11SDmitry Monakhov "quotafile must be on filesystem root"); 147156c50f11SDmitry Monakhov kfree(sbi->s_qf_names[qtype]); 147256c50f11SDmitry Monakhov sbi->s_qf_names[qtype] = NULL; 147356c50f11SDmitry Monakhov return 0; 147456c50f11SDmitry Monakhov } 1475fd8c37ecSTheodore Ts'o set_opt(sb, QUOTA); 147656c50f11SDmitry Monakhov return 1; 147756c50f11SDmitry Monakhov } 147856c50f11SDmitry Monakhov 147956c50f11SDmitry Monakhov static int clear_qf_name(struct super_block *sb, int qtype) 148056c50f11SDmitry Monakhov { 148156c50f11SDmitry Monakhov 148256c50f11SDmitry Monakhov struct ext4_sb_info *sbi = EXT4_SB(sb); 148356c50f11SDmitry Monakhov 148456c50f11SDmitry Monakhov if (sb_any_quota_loaded(sb) && 148556c50f11SDmitry Monakhov sbi->s_qf_names[qtype]) { 148656c50f11SDmitry Monakhov ext4_msg(sb, KERN_ERR, "Cannot change journaled quota options" 148756c50f11SDmitry Monakhov " when quota turned on"); 148856c50f11SDmitry Monakhov return 0; 148956c50f11SDmitry Monakhov } 149056c50f11SDmitry Monakhov /* 149156c50f11SDmitry Monakhov * The space will be released later when all options are confirmed 149256c50f11SDmitry Monakhov * to be correct 149356c50f11SDmitry Monakhov */ 149456c50f11SDmitry Monakhov sbi->s_qf_names[qtype] = NULL; 149556c50f11SDmitry Monakhov return 1; 149656c50f11SDmitry Monakhov } 149756c50f11SDmitry Monakhov #endif 149856c50f11SDmitry Monakhov 1499ac27a0ecSDave Kleikamp static int parse_options(char *options, struct super_block *sb, 1500c3191067STheodore Ts'o unsigned long *journal_devnum, 1501b3881f74STheodore Ts'o unsigned int *journal_ioprio, 1502617ba13bSMingming Cao ext4_fsblk_t *n_blocks_count, int is_remount) 1503ac27a0ecSDave Kleikamp { 1504617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 1505ac27a0ecSDave Kleikamp char *p; 1506ac27a0ecSDave Kleikamp substring_t args[MAX_OPT_ARGS]; 1507ac27a0ecSDave Kleikamp int data_opt = 0; 1508ac27a0ecSDave Kleikamp int option; 1509ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 151056c50f11SDmitry Monakhov int qfmt; 1511ac27a0ecSDave Kleikamp #endif 1512ac27a0ecSDave Kleikamp 1513ac27a0ecSDave Kleikamp if (!options) 1514ac27a0ecSDave Kleikamp return 1; 1515ac27a0ecSDave Kleikamp 1516ac27a0ecSDave Kleikamp while ((p = strsep(&options, ",")) != NULL) { 1517ac27a0ecSDave Kleikamp int token; 1518ac27a0ecSDave Kleikamp if (!*p) 1519ac27a0ecSDave Kleikamp continue; 1520ac27a0ecSDave Kleikamp 152115121c18SEric Sandeen /* 152215121c18SEric Sandeen * Initialize args struct so we know whether arg was 152315121c18SEric Sandeen * found; some options take optional arguments. 152415121c18SEric Sandeen */ 15257dc57615SPeter Huewe args[0].to = args[0].from = NULL; 1526ac27a0ecSDave Kleikamp token = match_token(p, tokens, args); 1527ac27a0ecSDave Kleikamp switch (token) { 1528ac27a0ecSDave Kleikamp case Opt_bsd_df: 1529437ca0fdSDmitry Monakhov ext4_msg(sb, KERN_WARNING, deprecated_msg, p, "2.6.38"); 1530fd8c37ecSTheodore Ts'o clear_opt(sb, MINIX_DF); 1531ac27a0ecSDave Kleikamp break; 1532ac27a0ecSDave Kleikamp case Opt_minix_df: 1533437ca0fdSDmitry Monakhov ext4_msg(sb, KERN_WARNING, deprecated_msg, p, "2.6.38"); 1534fd8c37ecSTheodore Ts'o set_opt(sb, MINIX_DF); 1535437ca0fdSDmitry Monakhov 1536ac27a0ecSDave Kleikamp break; 1537ac27a0ecSDave Kleikamp case Opt_grpid: 1538437ca0fdSDmitry Monakhov ext4_msg(sb, KERN_WARNING, deprecated_msg, p, "2.6.38"); 1539fd8c37ecSTheodore Ts'o set_opt(sb, GRPID); 1540437ca0fdSDmitry Monakhov 1541ac27a0ecSDave Kleikamp break; 1542ac27a0ecSDave Kleikamp case Opt_nogrpid: 1543437ca0fdSDmitry Monakhov ext4_msg(sb, KERN_WARNING, deprecated_msg, p, "2.6.38"); 1544fd8c37ecSTheodore Ts'o clear_opt(sb, GRPID); 1545437ca0fdSDmitry Monakhov 1546ac27a0ecSDave Kleikamp break; 1547ac27a0ecSDave Kleikamp case Opt_resuid: 1548ac27a0ecSDave Kleikamp if (match_int(&args[0], &option)) 1549ac27a0ecSDave Kleikamp return 0; 1550ac27a0ecSDave Kleikamp sbi->s_resuid = option; 1551ac27a0ecSDave Kleikamp break; 1552ac27a0ecSDave Kleikamp case Opt_resgid: 1553ac27a0ecSDave Kleikamp if (match_int(&args[0], &option)) 1554ac27a0ecSDave Kleikamp return 0; 1555ac27a0ecSDave Kleikamp sbi->s_resgid = option; 1556ac27a0ecSDave Kleikamp break; 1557ac27a0ecSDave Kleikamp case Opt_sb: 1558ac27a0ecSDave Kleikamp /* handled by get_sb_block() instead of here */ 1559ac27a0ecSDave Kleikamp /* *sb_block = match_int(&args[0]); */ 1560ac27a0ecSDave Kleikamp break; 1561ac27a0ecSDave Kleikamp case Opt_err_panic: 1562fd8c37ecSTheodore Ts'o clear_opt(sb, ERRORS_CONT); 1563fd8c37ecSTheodore Ts'o clear_opt(sb, ERRORS_RO); 1564fd8c37ecSTheodore Ts'o set_opt(sb, ERRORS_PANIC); 1565ac27a0ecSDave Kleikamp break; 1566ac27a0ecSDave Kleikamp case Opt_err_ro: 1567fd8c37ecSTheodore Ts'o clear_opt(sb, ERRORS_CONT); 1568fd8c37ecSTheodore Ts'o clear_opt(sb, ERRORS_PANIC); 1569fd8c37ecSTheodore Ts'o set_opt(sb, ERRORS_RO); 1570ac27a0ecSDave Kleikamp break; 1571ac27a0ecSDave Kleikamp case Opt_err_cont: 1572fd8c37ecSTheodore Ts'o clear_opt(sb, ERRORS_RO); 1573fd8c37ecSTheodore Ts'o clear_opt(sb, ERRORS_PANIC); 1574fd8c37ecSTheodore Ts'o set_opt(sb, ERRORS_CONT); 1575ac27a0ecSDave Kleikamp break; 1576ac27a0ecSDave Kleikamp case Opt_nouid32: 1577fd8c37ecSTheodore Ts'o set_opt(sb, NO_UID32); 1578ac27a0ecSDave Kleikamp break; 1579ac27a0ecSDave Kleikamp case Opt_debug: 1580fd8c37ecSTheodore Ts'o set_opt(sb, DEBUG); 1581ac27a0ecSDave Kleikamp break; 1582ac27a0ecSDave Kleikamp case Opt_oldalloc: 15834113c4caSLukas Czerner ext4_msg(sb, KERN_WARNING, 15844113c4caSLukas Czerner "Ignoring deprecated oldalloc option"); 1585ac27a0ecSDave Kleikamp break; 1586ac27a0ecSDave Kleikamp case Opt_orlov: 15874113c4caSLukas Czerner ext4_msg(sb, KERN_WARNING, 15884113c4caSLukas Czerner "Ignoring deprecated orlov option"); 1589ac27a0ecSDave Kleikamp break; 159003010a33STheodore Ts'o #ifdef CONFIG_EXT4_FS_XATTR 1591ac27a0ecSDave Kleikamp case Opt_user_xattr: 1592fd8c37ecSTheodore Ts'o set_opt(sb, XATTR_USER); 1593ac27a0ecSDave Kleikamp break; 1594ac27a0ecSDave Kleikamp case Opt_nouser_xattr: 1595fd8c37ecSTheodore Ts'o clear_opt(sb, XATTR_USER); 1596ac27a0ecSDave Kleikamp break; 1597ac27a0ecSDave Kleikamp #else 1598ac27a0ecSDave Kleikamp case Opt_user_xattr: 1599ac27a0ecSDave Kleikamp case Opt_nouser_xattr: 1600b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "(no)user_xattr options not supported"); 1601ac27a0ecSDave Kleikamp break; 1602ac27a0ecSDave Kleikamp #endif 160303010a33STheodore Ts'o #ifdef CONFIG_EXT4_FS_POSIX_ACL 1604ac27a0ecSDave Kleikamp case Opt_acl: 1605fd8c37ecSTheodore Ts'o set_opt(sb, POSIX_ACL); 1606ac27a0ecSDave Kleikamp break; 1607ac27a0ecSDave Kleikamp case Opt_noacl: 1608fd8c37ecSTheodore Ts'o clear_opt(sb, POSIX_ACL); 1609ac27a0ecSDave Kleikamp break; 1610ac27a0ecSDave Kleikamp #else 1611ac27a0ecSDave Kleikamp case Opt_acl: 1612ac27a0ecSDave Kleikamp case Opt_noacl: 1613b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "(no)acl options not supported"); 1614ac27a0ecSDave Kleikamp break; 1615ac27a0ecSDave Kleikamp #endif 1616ac27a0ecSDave Kleikamp case Opt_journal_update: 1617ac27a0ecSDave Kleikamp /* @@@ FIXME */ 1618ac27a0ecSDave Kleikamp /* Eventually we will want to be able to create 1619ac27a0ecSDave Kleikamp a journal file here. For now, only allow the 1620ac27a0ecSDave Kleikamp user to specify an existing inode to be the 1621ac27a0ecSDave Kleikamp journal file. */ 1622ac27a0ecSDave Kleikamp if (is_remount) { 1623b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 1624b31e1552SEric Sandeen "Cannot specify journal on remount"); 1625ac27a0ecSDave Kleikamp return 0; 1626ac27a0ecSDave Kleikamp } 1627fd8c37ecSTheodore Ts'o set_opt(sb, UPDATE_JOURNAL); 1628ac27a0ecSDave Kleikamp break; 1629ac27a0ecSDave Kleikamp case Opt_journal_dev: 1630ac27a0ecSDave Kleikamp if (is_remount) { 1631b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 1632b31e1552SEric Sandeen "Cannot specify journal on remount"); 1633ac27a0ecSDave Kleikamp return 0; 1634ac27a0ecSDave Kleikamp } 1635ac27a0ecSDave Kleikamp if (match_int(&args[0], &option)) 1636ac27a0ecSDave Kleikamp return 0; 1637ac27a0ecSDave Kleikamp *journal_devnum = option; 1638ac27a0ecSDave Kleikamp break; 1639818d276cSGirish Shilamkar case Opt_journal_checksum: 1640fd8c37ecSTheodore Ts'o set_opt(sb, JOURNAL_CHECKSUM); 1641d4da6c9cSLinus Torvalds break; 1642818d276cSGirish Shilamkar case Opt_journal_async_commit: 1643fd8c37ecSTheodore Ts'o set_opt(sb, JOURNAL_ASYNC_COMMIT); 1644fd8c37ecSTheodore Ts'o set_opt(sb, JOURNAL_CHECKSUM); 1645818d276cSGirish Shilamkar break; 1646ac27a0ecSDave Kleikamp case Opt_noload: 1647fd8c37ecSTheodore Ts'o set_opt(sb, NOLOAD); 1648ac27a0ecSDave Kleikamp break; 1649ac27a0ecSDave Kleikamp case Opt_commit: 1650ac27a0ecSDave Kleikamp if (match_int(&args[0], &option)) 1651ac27a0ecSDave Kleikamp return 0; 1652ac27a0ecSDave Kleikamp if (option < 0) 1653ac27a0ecSDave Kleikamp return 0; 1654ac27a0ecSDave Kleikamp if (option == 0) 1655cd02ff0bSMingming Cao option = JBD2_DEFAULT_MAX_COMMIT_AGE; 1656ac27a0ecSDave Kleikamp sbi->s_commit_interval = HZ * option; 1657ac27a0ecSDave Kleikamp break; 165830773840STheodore Ts'o case Opt_max_batch_time: 165930773840STheodore Ts'o if (match_int(&args[0], &option)) 166030773840STheodore Ts'o return 0; 166130773840STheodore Ts'o if (option < 0) 166230773840STheodore Ts'o return 0; 166330773840STheodore Ts'o if (option == 0) 166430773840STheodore Ts'o option = EXT4_DEF_MAX_BATCH_TIME; 166530773840STheodore Ts'o sbi->s_max_batch_time = option; 166630773840STheodore Ts'o break; 166730773840STheodore Ts'o case Opt_min_batch_time: 166830773840STheodore Ts'o if (match_int(&args[0], &option)) 166930773840STheodore Ts'o return 0; 167030773840STheodore Ts'o if (option < 0) 167130773840STheodore Ts'o return 0; 167230773840STheodore Ts'o sbi->s_min_batch_time = option; 167330773840STheodore Ts'o break; 1674ac27a0ecSDave Kleikamp case Opt_data_journal: 1675617ba13bSMingming Cao data_opt = EXT4_MOUNT_JOURNAL_DATA; 1676ac27a0ecSDave Kleikamp goto datacheck; 1677ac27a0ecSDave Kleikamp case Opt_data_ordered: 1678617ba13bSMingming Cao data_opt = EXT4_MOUNT_ORDERED_DATA; 1679ac27a0ecSDave Kleikamp goto datacheck; 1680ac27a0ecSDave Kleikamp case Opt_data_writeback: 1681617ba13bSMingming Cao data_opt = EXT4_MOUNT_WRITEBACK_DATA; 1682ac27a0ecSDave Kleikamp datacheck: 1683ac27a0ecSDave Kleikamp if (is_remount) { 1684eb513689STheodore Ts'o if (!sbi->s_journal) 1685eb513689STheodore Ts'o ext4_msg(sb, KERN_WARNING, "Remounting file system with no journal so ignoring journalled data option"); 1686eb513689STheodore Ts'o else if (test_opt(sb, DATA_FLAGS) != data_opt) { 1687b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 1688b31e1552SEric Sandeen "Cannot change data mode on remount"); 1689ac27a0ecSDave Kleikamp return 0; 1690ac27a0ecSDave Kleikamp } 1691ac27a0ecSDave Kleikamp } else { 1692fd8c37ecSTheodore Ts'o clear_opt(sb, DATA_FLAGS); 1693ac27a0ecSDave Kleikamp sbi->s_mount_opt |= data_opt; 1694ac27a0ecSDave Kleikamp } 1695ac27a0ecSDave Kleikamp break; 16965bf5683aSHidehiro Kawai case Opt_data_err_abort: 1697fd8c37ecSTheodore Ts'o set_opt(sb, DATA_ERR_ABORT); 16985bf5683aSHidehiro Kawai break; 16995bf5683aSHidehiro Kawai case Opt_data_err_ignore: 1700fd8c37ecSTheodore Ts'o clear_opt(sb, DATA_ERR_ABORT); 17015bf5683aSHidehiro Kawai break; 1702ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1703ac27a0ecSDave Kleikamp case Opt_usrjquota: 170456c50f11SDmitry Monakhov if (!set_qf_name(sb, USRQUOTA, &args[0])) 170556c50f11SDmitry Monakhov return 0; 170656c50f11SDmitry Monakhov break; 1707ac27a0ecSDave Kleikamp case Opt_grpjquota: 170856c50f11SDmitry Monakhov if (!set_qf_name(sb, GRPQUOTA, &args[0])) 1709ac27a0ecSDave Kleikamp return 0; 1710ac27a0ecSDave Kleikamp break; 1711ac27a0ecSDave Kleikamp case Opt_offusrjquota: 171256c50f11SDmitry Monakhov if (!clear_qf_name(sb, USRQUOTA)) 1713ac27a0ecSDave Kleikamp return 0; 1714ac27a0ecSDave Kleikamp break; 171556c50f11SDmitry Monakhov case Opt_offgrpjquota: 171656c50f11SDmitry Monakhov if (!clear_qf_name(sb, GRPQUOTA)) 171756c50f11SDmitry Monakhov return 0; 171856c50f11SDmitry Monakhov break; 171956c50f11SDmitry Monakhov 1720ac27a0ecSDave Kleikamp case Opt_jqfmt_vfsold: 1721dfc5d03fSJan Kara qfmt = QFMT_VFS_OLD; 1722dfc5d03fSJan Kara goto set_qf_format; 1723ac27a0ecSDave Kleikamp case Opt_jqfmt_vfsv0: 1724dfc5d03fSJan Kara qfmt = QFMT_VFS_V0; 17255a20bdfcSJan Kara goto set_qf_format; 17265a20bdfcSJan Kara case Opt_jqfmt_vfsv1: 17275a20bdfcSJan Kara qfmt = QFMT_VFS_V1; 1728dfc5d03fSJan Kara set_qf_format: 172917bd13b3SJan Kara if (sb_any_quota_loaded(sb) && 1730dfc5d03fSJan Kara sbi->s_jquota_fmt != qfmt) { 1731b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "Cannot change " 1732dfc5d03fSJan Kara "journaled quota options when " 1733b31e1552SEric Sandeen "quota turned on"); 1734dfc5d03fSJan Kara return 0; 1735dfc5d03fSJan Kara } 1736dfc5d03fSJan Kara sbi->s_jquota_fmt = qfmt; 1737ac27a0ecSDave Kleikamp break; 1738ac27a0ecSDave Kleikamp case Opt_quota: 1739ac27a0ecSDave Kleikamp case Opt_usrquota: 1740fd8c37ecSTheodore Ts'o set_opt(sb, QUOTA); 1741fd8c37ecSTheodore Ts'o set_opt(sb, USRQUOTA); 1742ac27a0ecSDave Kleikamp break; 1743ac27a0ecSDave Kleikamp case Opt_grpquota: 1744fd8c37ecSTheodore Ts'o set_opt(sb, QUOTA); 1745fd8c37ecSTheodore Ts'o set_opt(sb, GRPQUOTA); 1746ac27a0ecSDave Kleikamp break; 1747ac27a0ecSDave Kleikamp case Opt_noquota: 174817bd13b3SJan Kara if (sb_any_quota_loaded(sb)) { 1749b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "Cannot change quota " 1750b31e1552SEric Sandeen "options when quota turned on"); 1751ac27a0ecSDave Kleikamp return 0; 1752ac27a0ecSDave Kleikamp } 1753fd8c37ecSTheodore Ts'o clear_opt(sb, QUOTA); 1754fd8c37ecSTheodore Ts'o clear_opt(sb, USRQUOTA); 1755fd8c37ecSTheodore Ts'o clear_opt(sb, GRPQUOTA); 1756ac27a0ecSDave Kleikamp break; 1757ac27a0ecSDave Kleikamp #else 1758ac27a0ecSDave Kleikamp case Opt_quota: 1759ac27a0ecSDave Kleikamp case Opt_usrquota: 1760ac27a0ecSDave Kleikamp case Opt_grpquota: 1761b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 1762b31e1552SEric Sandeen "quota options not supported"); 1763cd59e7b9SJan Kara break; 1764ac27a0ecSDave Kleikamp case Opt_usrjquota: 1765ac27a0ecSDave Kleikamp case Opt_grpjquota: 1766ac27a0ecSDave Kleikamp case Opt_offusrjquota: 1767ac27a0ecSDave Kleikamp case Opt_offgrpjquota: 1768ac27a0ecSDave Kleikamp case Opt_jqfmt_vfsold: 1769ac27a0ecSDave Kleikamp case Opt_jqfmt_vfsv0: 17705a20bdfcSJan Kara case Opt_jqfmt_vfsv1: 1771b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 1772b31e1552SEric Sandeen "journaled quota options not supported"); 1773ac27a0ecSDave Kleikamp break; 1774ac27a0ecSDave Kleikamp case Opt_noquota: 1775ac27a0ecSDave Kleikamp break; 1776ac27a0ecSDave Kleikamp #endif 1777ac27a0ecSDave Kleikamp case Opt_abort: 17784ab2f15bSTheodore Ts'o sbi->s_mount_flags |= EXT4_MF_FS_ABORTED; 1779ac27a0ecSDave Kleikamp break; 178006705bffSTheodore Ts'o case Opt_nobarrier: 1781fd8c37ecSTheodore Ts'o clear_opt(sb, BARRIER); 178206705bffSTheodore Ts'o break; 1783ac27a0ecSDave Kleikamp case Opt_barrier: 178415121c18SEric Sandeen if (args[0].from) { 178515121c18SEric Sandeen if (match_int(&args[0], &option)) 178615121c18SEric Sandeen return 0; 178715121c18SEric Sandeen } else 178815121c18SEric Sandeen option = 1; /* No argument, default to 1 */ 1789ac27a0ecSDave Kleikamp if (option) 1790fd8c37ecSTheodore Ts'o set_opt(sb, BARRIER); 1791ac27a0ecSDave Kleikamp else 1792fd8c37ecSTheodore Ts'o clear_opt(sb, BARRIER); 1793ac27a0ecSDave Kleikamp break; 1794ac27a0ecSDave Kleikamp case Opt_ignore: 1795ac27a0ecSDave Kleikamp break; 1796ac27a0ecSDave Kleikamp case Opt_resize: 1797ac27a0ecSDave Kleikamp if (!is_remount) { 1798b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 1799b31e1552SEric Sandeen "resize option only available " 1800b31e1552SEric Sandeen "for remount"); 1801ac27a0ecSDave Kleikamp return 0; 1802ac27a0ecSDave Kleikamp } 1803ac27a0ecSDave Kleikamp if (match_int(&args[0], &option) != 0) 1804ac27a0ecSDave Kleikamp return 0; 1805ac27a0ecSDave Kleikamp *n_blocks_count = option; 1806ac27a0ecSDave Kleikamp break; 1807ac27a0ecSDave Kleikamp case Opt_nobh: 1808206f7ab4SChristoph Hellwig ext4_msg(sb, KERN_WARNING, 1809206f7ab4SChristoph Hellwig "Ignoring deprecated nobh option"); 1810ac27a0ecSDave Kleikamp break; 1811ac27a0ecSDave Kleikamp case Opt_bh: 1812206f7ab4SChristoph Hellwig ext4_msg(sb, KERN_WARNING, 1813206f7ab4SChristoph Hellwig "Ignoring deprecated bh option"); 1814ac27a0ecSDave Kleikamp break; 181525ec56b5SJean Noel Cordenner case Opt_i_version: 1816fd8c37ecSTheodore Ts'o set_opt(sb, I_VERSION); 181725ec56b5SJean Noel Cordenner sb->s_flags |= MS_I_VERSION; 181825ec56b5SJean Noel Cordenner break; 1819dd919b98SAneesh Kumar K.V case Opt_nodelalloc: 1820fd8c37ecSTheodore Ts'o clear_opt(sb, DELALLOC); 182156889787STheodore Ts'o clear_opt2(sb, EXPLICIT_DELALLOC); 1822dd919b98SAneesh Kumar K.V break; 18231449032bSTheodore Ts'o case Opt_mblk_io_submit: 1824fd8c37ecSTheodore Ts'o set_opt(sb, MBLK_IO_SUBMIT); 18251449032bSTheodore Ts'o break; 18261449032bSTheodore Ts'o case Opt_nomblk_io_submit: 1827fd8c37ecSTheodore Ts'o clear_opt(sb, MBLK_IO_SUBMIT); 18281449032bSTheodore Ts'o break; 1829c9de560dSAlex Tomas case Opt_stripe: 1830c9de560dSAlex Tomas if (match_int(&args[0], &option)) 1831c9de560dSAlex Tomas return 0; 1832c9de560dSAlex Tomas if (option < 0) 1833c9de560dSAlex Tomas return 0; 1834c9de560dSAlex Tomas sbi->s_stripe = option; 1835c9de560dSAlex Tomas break; 183664769240SAlex Tomas case Opt_delalloc: 1837fd8c37ecSTheodore Ts'o set_opt(sb, DELALLOC); 183856889787STheodore Ts'o set_opt2(sb, EXPLICIT_DELALLOC); 183964769240SAlex Tomas break; 18406fd058f7STheodore Ts'o case Opt_block_validity: 1841fd8c37ecSTheodore Ts'o set_opt(sb, BLOCK_VALIDITY); 18426fd058f7STheodore Ts'o break; 18436fd058f7STheodore Ts'o case Opt_noblock_validity: 1844fd8c37ecSTheodore Ts'o clear_opt(sb, BLOCK_VALIDITY); 18456fd058f7STheodore Ts'o break; 1846240799cdSTheodore Ts'o case Opt_inode_readahead_blks: 1847240799cdSTheodore Ts'o if (match_int(&args[0], &option)) 1848240799cdSTheodore Ts'o return 0; 1849240799cdSTheodore Ts'o if (option < 0 || option > (1 << 30)) 1850240799cdSTheodore Ts'o return 0; 18515dbd571dSAlexander V. Lukyanov if (option && !is_power_of_2(option)) { 1852b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 1853b31e1552SEric Sandeen "EXT4-fs: inode_readahead_blks" 1854b31e1552SEric Sandeen " must be a power of 2"); 18553197ebdbSTheodore Ts'o return 0; 18563197ebdbSTheodore Ts'o } 1857240799cdSTheodore Ts'o sbi->s_inode_readahead_blks = option; 1858240799cdSTheodore Ts'o break; 1859b3881f74STheodore Ts'o case Opt_journal_ioprio: 1860b3881f74STheodore Ts'o if (match_int(&args[0], &option)) 1861b3881f74STheodore Ts'o return 0; 1862b3881f74STheodore Ts'o if (option < 0 || option > 7) 1863b3881f74STheodore Ts'o break; 1864b3881f74STheodore Ts'o *journal_ioprio = IOPRIO_PRIO_VALUE(IOPRIO_CLASS_BE, 1865b3881f74STheodore Ts'o option); 1866b3881f74STheodore Ts'o break; 186706705bffSTheodore Ts'o case Opt_noauto_da_alloc: 1868fd8c37ecSTheodore Ts'o set_opt(sb, NO_AUTO_DA_ALLOC); 186906705bffSTheodore Ts'o break; 1870afd4672dSTheodore Ts'o case Opt_auto_da_alloc: 187115121c18SEric Sandeen if (args[0].from) { 187215121c18SEric Sandeen if (match_int(&args[0], &option)) 187315121c18SEric Sandeen return 0; 187415121c18SEric Sandeen } else 187515121c18SEric Sandeen option = 1; /* No argument, default to 1 */ 1876afd4672dSTheodore Ts'o if (option) 1877fd8c37ecSTheodore Ts'o clear_opt(sb, NO_AUTO_DA_ALLOC); 1878afd4672dSTheodore Ts'o else 1879fd8c37ecSTheodore Ts'o set_opt(sb,NO_AUTO_DA_ALLOC); 1880afd4672dSTheodore Ts'o break; 18815328e635SEric Sandeen case Opt_discard: 1882fd8c37ecSTheodore Ts'o set_opt(sb, DISCARD); 18835328e635SEric Sandeen break; 18845328e635SEric Sandeen case Opt_nodiscard: 1885fd8c37ecSTheodore Ts'o clear_opt(sb, DISCARD); 18865328e635SEric Sandeen break; 1887744692dcSJiaying Zhang case Opt_dioread_nolock: 1888fd8c37ecSTheodore Ts'o set_opt(sb, DIOREAD_NOLOCK); 1889744692dcSJiaying Zhang break; 1890744692dcSJiaying Zhang case Opt_dioread_lock: 1891fd8c37ecSTheodore Ts'o clear_opt(sb, DIOREAD_NOLOCK); 1892744692dcSJiaying Zhang break; 1893fc6cb1cdSTheodore Ts'o case Opt_init_itable: 1894fd8c37ecSTheodore Ts'o set_opt(sb, INIT_INODE_TABLE); 1895bfff6873SLukas Czerner if (args[0].from) { 1896bfff6873SLukas Czerner if (match_int(&args[0], &option)) 1897bfff6873SLukas Czerner return 0; 1898bfff6873SLukas Czerner } else 1899bfff6873SLukas Czerner option = EXT4_DEF_LI_WAIT_MULT; 1900bfff6873SLukas Czerner if (option < 0) 1901bfff6873SLukas Czerner return 0; 1902bfff6873SLukas Czerner sbi->s_li_wait_mult = option; 1903bfff6873SLukas Czerner break; 1904fc6cb1cdSTheodore Ts'o case Opt_noinit_itable: 1905fd8c37ecSTheodore Ts'o clear_opt(sb, INIT_INODE_TABLE); 1906bfff6873SLukas Czerner break; 1907ac27a0ecSDave Kleikamp default: 1908b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 1909b31e1552SEric Sandeen "Unrecognized mount option \"%s\" " 1910b31e1552SEric Sandeen "or missing value", p); 1911ac27a0ecSDave Kleikamp return 0; 1912ac27a0ecSDave Kleikamp } 1913ac27a0ecSDave Kleikamp } 1914ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1915ac27a0ecSDave Kleikamp if (sbi->s_qf_names[USRQUOTA] || sbi->s_qf_names[GRPQUOTA]) { 1916482a7425SDmitry Monakhov if (test_opt(sb, USRQUOTA) && sbi->s_qf_names[USRQUOTA]) 1917fd8c37ecSTheodore Ts'o clear_opt(sb, USRQUOTA); 1918ac27a0ecSDave Kleikamp 1919482a7425SDmitry Monakhov if (test_opt(sb, GRPQUOTA) && sbi->s_qf_names[GRPQUOTA]) 1920fd8c37ecSTheodore Ts'o clear_opt(sb, GRPQUOTA); 1921ac27a0ecSDave Kleikamp 192256c50f11SDmitry Monakhov if (test_opt(sb, GRPQUOTA) || test_opt(sb, USRQUOTA)) { 1923b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "old and new quota " 1924b31e1552SEric Sandeen "format mixing"); 1925ac27a0ecSDave Kleikamp return 0; 1926ac27a0ecSDave Kleikamp } 1927ac27a0ecSDave Kleikamp 1928ac27a0ecSDave Kleikamp if (!sbi->s_jquota_fmt) { 1929b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "journaled quota format " 1930b31e1552SEric Sandeen "not specified"); 1931ac27a0ecSDave Kleikamp return 0; 1932ac27a0ecSDave Kleikamp } 1933ac27a0ecSDave Kleikamp } else { 1934ac27a0ecSDave Kleikamp if (sbi->s_jquota_fmt) { 1935b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "journaled quota format " 19362c8be6b2SJan Kara "specified with no journaling " 1937b31e1552SEric Sandeen "enabled"); 1938ac27a0ecSDave Kleikamp return 0; 1939ac27a0ecSDave Kleikamp } 1940ac27a0ecSDave Kleikamp } 1941ac27a0ecSDave Kleikamp #endif 1942ac27a0ecSDave Kleikamp return 1; 1943ac27a0ecSDave Kleikamp } 1944ac27a0ecSDave Kleikamp 1945617ba13bSMingming Cao static int ext4_setup_super(struct super_block *sb, struct ext4_super_block *es, 1946ac27a0ecSDave Kleikamp int read_only) 1947ac27a0ecSDave Kleikamp { 1948617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 1949ac27a0ecSDave Kleikamp int res = 0; 1950ac27a0ecSDave Kleikamp 1951617ba13bSMingming Cao if (le32_to_cpu(es->s_rev_level) > EXT4_MAX_SUPP_REV) { 1952b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "revision level too high, " 1953b31e1552SEric Sandeen "forcing read-only mode"); 1954ac27a0ecSDave Kleikamp res = MS_RDONLY; 1955ac27a0ecSDave Kleikamp } 1956ac27a0ecSDave Kleikamp if (read_only) 1957281b5995STheodore Ts'o goto done; 1958617ba13bSMingming Cao if (!(sbi->s_mount_state & EXT4_VALID_FS)) 1959b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "warning: mounting unchecked fs, " 1960b31e1552SEric Sandeen "running e2fsck is recommended"); 1961617ba13bSMingming Cao else if ((sbi->s_mount_state & EXT4_ERROR_FS)) 1962b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 1963b31e1552SEric Sandeen "warning: mounting fs with errors, " 1964b31e1552SEric Sandeen "running e2fsck is recommended"); 1965ed3ce80aSTao Ma else if ((__s16) le16_to_cpu(es->s_max_mnt_count) > 0 && 1966ac27a0ecSDave Kleikamp le16_to_cpu(es->s_mnt_count) >= 1967ac27a0ecSDave Kleikamp (unsigned short) (__s16) le16_to_cpu(es->s_max_mnt_count)) 1968b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 1969b31e1552SEric Sandeen "warning: maximal mount count reached, " 1970b31e1552SEric Sandeen "running e2fsck is recommended"); 1971ac27a0ecSDave Kleikamp else if (le32_to_cpu(es->s_checkinterval) && 1972ac27a0ecSDave Kleikamp (le32_to_cpu(es->s_lastcheck) + 1973ac27a0ecSDave Kleikamp le32_to_cpu(es->s_checkinterval) <= get_seconds())) 1974b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 1975b31e1552SEric Sandeen "warning: checktime reached, " 1976b31e1552SEric Sandeen "running e2fsck is recommended"); 19770390131bSFrank Mayhar if (!sbi->s_journal) 1978216c34b2SMarcin Slusarz es->s_state &= cpu_to_le16(~EXT4_VALID_FS); 1979ac27a0ecSDave Kleikamp if (!(__s16) le16_to_cpu(es->s_max_mnt_count)) 1980617ba13bSMingming Cao es->s_max_mnt_count = cpu_to_le16(EXT4_DFL_MAX_MNT_COUNT); 1981e8546d06SMarcin Slusarz le16_add_cpu(&es->s_mnt_count, 1); 1982ac27a0ecSDave Kleikamp es->s_mtime = cpu_to_le32(get_seconds()); 1983617ba13bSMingming Cao ext4_update_dynamic_rev(sb); 19840390131bSFrank Mayhar if (sbi->s_journal) 1985617ba13bSMingming Cao EXT4_SET_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); 1986ac27a0ecSDave Kleikamp 1987e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 1988281b5995STheodore Ts'o done: 1989ac27a0ecSDave Kleikamp if (test_opt(sb, DEBUG)) 1990a9df9a49STheodore Ts'o printk(KERN_INFO "[EXT4 FS bs=%lu, gc=%u, " 1991a2595b8aSTheodore Ts'o "bpg=%lu, ipg=%lu, mo=%04x, mo2=%04x]\n", 1992ac27a0ecSDave Kleikamp sb->s_blocksize, 1993ac27a0ecSDave Kleikamp sbi->s_groups_count, 1994617ba13bSMingming Cao EXT4_BLOCKS_PER_GROUP(sb), 1995617ba13bSMingming Cao EXT4_INODES_PER_GROUP(sb), 1996a2595b8aSTheodore Ts'o sbi->s_mount_opt, sbi->s_mount_opt2); 1997ac27a0ecSDave Kleikamp 19987abc52c2SDan Magenheimer cleancache_init_fs(sb); 1999ac27a0ecSDave Kleikamp return res; 2000ac27a0ecSDave Kleikamp } 2001ac27a0ecSDave Kleikamp 2002772cb7c8SJose R. Santos static int ext4_fill_flex_info(struct super_block *sb) 2003772cb7c8SJose R. Santos { 2004772cb7c8SJose R. Santos struct ext4_sb_info *sbi = EXT4_SB(sb); 2005772cb7c8SJose R. Santos struct ext4_group_desc *gdp = NULL; 2006772cb7c8SJose R. Santos ext4_group_t flex_group_count; 2007772cb7c8SJose R. Santos ext4_group_t flex_group; 2008772cb7c8SJose R. Santos int groups_per_flex = 0; 2009c5ca7c76STheodore Ts'o size_t size; 2010772cb7c8SJose R. Santos int i; 2011772cb7c8SJose R. Santos 2012503358aeSTheodore Ts'o sbi->s_log_groups_per_flex = sbi->s_es->s_log_groups_per_flex; 2013503358aeSTheodore Ts'o groups_per_flex = 1 << sbi->s_log_groups_per_flex; 2014503358aeSTheodore Ts'o 2015503358aeSTheodore Ts'o if (groups_per_flex < 2) { 2016772cb7c8SJose R. Santos sbi->s_log_groups_per_flex = 0; 2017772cb7c8SJose R. Santos return 1; 2018772cb7c8SJose R. Santos } 2019772cb7c8SJose R. Santos 2020c62a11fdSFrederic Bohe /* We allocate both existing and potentially added groups */ 2021c62a11fdSFrederic Bohe flex_group_count = ((sbi->s_groups_count + groups_per_flex - 1) + 2022d94e99a6SAneesh Kumar K.V ((le16_to_cpu(sbi->s_es->s_reserved_gdt_blocks) + 1) << 2023d94e99a6SAneesh Kumar K.V EXT4_DESC_PER_BLOCK_BITS(sb))) / groups_per_flex; 2024c5ca7c76STheodore Ts'o size = flex_group_count * sizeof(struct flex_groups); 20259933fc0aSTheodore Ts'o sbi->s_flex_groups = ext4_kvzalloc(size, GFP_KERNEL); 2026c5ca7c76STheodore Ts'o if (sbi->s_flex_groups == NULL) { 20279933fc0aSTheodore Ts'o ext4_msg(sb, KERN_ERR, "not enough memory for %u flex groups", 202894de56abSJoe Perches flex_group_count); 2029772cb7c8SJose R. Santos goto failed; 2030772cb7c8SJose R. Santos } 2031772cb7c8SJose R. Santos 2032772cb7c8SJose R. Santos for (i = 0; i < sbi->s_groups_count; i++) { 203388b6edd1STheodore Ts'o gdp = ext4_get_group_desc(sb, i, NULL); 2034772cb7c8SJose R. Santos 2035772cb7c8SJose R. Santos flex_group = ext4_flex_group(sbi, i); 20367ad9bb65STheodore Ts'o atomic_add(ext4_free_inodes_count(sb, gdp), 20377ad9bb65STheodore Ts'o &sbi->s_flex_groups[flex_group].free_inodes); 2038021b65bbSTheodore Ts'o atomic_add(ext4_free_group_clusters(sb, gdp), 203924aaa8efSTheodore Ts'o &sbi->s_flex_groups[flex_group].free_clusters); 20407ad9bb65STheodore Ts'o atomic_add(ext4_used_dirs_count(sb, gdp), 20417ad9bb65STheodore Ts'o &sbi->s_flex_groups[flex_group].used_dirs); 2042772cb7c8SJose R. Santos } 2043772cb7c8SJose R. Santos 2044772cb7c8SJose R. Santos return 1; 2045772cb7c8SJose R. Santos failed: 2046772cb7c8SJose R. Santos return 0; 2047772cb7c8SJose R. Santos } 2048772cb7c8SJose R. Santos 2049717d50e4SAndreas Dilger __le16 ext4_group_desc_csum(struct ext4_sb_info *sbi, __u32 block_group, 2050717d50e4SAndreas Dilger struct ext4_group_desc *gdp) 2051717d50e4SAndreas Dilger { 2052717d50e4SAndreas Dilger __u16 crc = 0; 2053717d50e4SAndreas Dilger 2054717d50e4SAndreas Dilger if (sbi->s_es->s_feature_ro_compat & 2055717d50e4SAndreas Dilger cpu_to_le32(EXT4_FEATURE_RO_COMPAT_GDT_CSUM)) { 2056717d50e4SAndreas Dilger int offset = offsetof(struct ext4_group_desc, bg_checksum); 2057717d50e4SAndreas Dilger __le32 le_group = cpu_to_le32(block_group); 2058717d50e4SAndreas Dilger 2059717d50e4SAndreas Dilger crc = crc16(~0, sbi->s_es->s_uuid, sizeof(sbi->s_es->s_uuid)); 2060717d50e4SAndreas Dilger crc = crc16(crc, (__u8 *)&le_group, sizeof(le_group)); 2061717d50e4SAndreas Dilger crc = crc16(crc, (__u8 *)gdp, offset); 2062717d50e4SAndreas Dilger offset += sizeof(gdp->bg_checksum); /* skip checksum */ 2063717d50e4SAndreas Dilger /* for checksum of struct ext4_group_desc do the rest...*/ 2064717d50e4SAndreas Dilger if ((sbi->s_es->s_feature_incompat & 2065717d50e4SAndreas Dilger cpu_to_le32(EXT4_FEATURE_INCOMPAT_64BIT)) && 2066717d50e4SAndreas Dilger offset < le16_to_cpu(sbi->s_es->s_desc_size)) 2067717d50e4SAndreas Dilger crc = crc16(crc, (__u8 *)gdp + offset, 2068717d50e4SAndreas Dilger le16_to_cpu(sbi->s_es->s_desc_size) - 2069717d50e4SAndreas Dilger offset); 2070717d50e4SAndreas Dilger } 2071717d50e4SAndreas Dilger 2072717d50e4SAndreas Dilger return cpu_to_le16(crc); 2073717d50e4SAndreas Dilger } 2074717d50e4SAndreas Dilger 2075717d50e4SAndreas Dilger int ext4_group_desc_csum_verify(struct ext4_sb_info *sbi, __u32 block_group, 2076717d50e4SAndreas Dilger struct ext4_group_desc *gdp) 2077717d50e4SAndreas Dilger { 2078717d50e4SAndreas Dilger if ((sbi->s_es->s_feature_ro_compat & 2079717d50e4SAndreas Dilger cpu_to_le32(EXT4_FEATURE_RO_COMPAT_GDT_CSUM)) && 2080717d50e4SAndreas Dilger (gdp->bg_checksum != ext4_group_desc_csum(sbi, block_group, gdp))) 2081717d50e4SAndreas Dilger return 0; 2082717d50e4SAndreas Dilger 2083717d50e4SAndreas Dilger return 1; 2084717d50e4SAndreas Dilger } 2085717d50e4SAndreas Dilger 2086ac27a0ecSDave Kleikamp /* Called at mount-time, super-block is locked */ 2087bfff6873SLukas Czerner static int ext4_check_descriptors(struct super_block *sb, 2088bfff6873SLukas Czerner ext4_group_t *first_not_zeroed) 2089ac27a0ecSDave Kleikamp { 2090617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 2091617ba13bSMingming Cao ext4_fsblk_t first_block = le32_to_cpu(sbi->s_es->s_first_data_block); 2092617ba13bSMingming Cao ext4_fsblk_t last_block; 2093bd81d8eeSLaurent Vivier ext4_fsblk_t block_bitmap; 2094bd81d8eeSLaurent Vivier ext4_fsblk_t inode_bitmap; 2095bd81d8eeSLaurent Vivier ext4_fsblk_t inode_table; 2096ce421581SJose R. Santos int flexbg_flag = 0; 2097bfff6873SLukas Czerner ext4_group_t i, grp = sbi->s_groups_count; 2098ac27a0ecSDave Kleikamp 2099ce421581SJose R. Santos if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_FLEX_BG)) 2100ce421581SJose R. Santos flexbg_flag = 1; 2101ce421581SJose R. Santos 2102617ba13bSMingming Cao ext4_debug("Checking group descriptors"); 2103ac27a0ecSDave Kleikamp 2104197cd65aSAkinobu Mita for (i = 0; i < sbi->s_groups_count; i++) { 2105197cd65aSAkinobu Mita struct ext4_group_desc *gdp = ext4_get_group_desc(sb, i, NULL); 2106197cd65aSAkinobu Mita 2107ce421581SJose R. Santos if (i == sbi->s_groups_count - 1 || flexbg_flag) 2108bd81d8eeSLaurent Vivier last_block = ext4_blocks_count(sbi->s_es) - 1; 2109ac27a0ecSDave Kleikamp else 2110ac27a0ecSDave Kleikamp last_block = first_block + 2111617ba13bSMingming Cao (EXT4_BLOCKS_PER_GROUP(sb) - 1); 2112ac27a0ecSDave Kleikamp 2113bfff6873SLukas Czerner if ((grp == sbi->s_groups_count) && 2114bfff6873SLukas Czerner !(gdp->bg_flags & cpu_to_le16(EXT4_BG_INODE_ZEROED))) 2115bfff6873SLukas Czerner grp = i; 2116bfff6873SLukas Czerner 21178fadc143SAlexandre Ratchov block_bitmap = ext4_block_bitmap(sb, gdp); 21182b2d6d01STheodore Ts'o if (block_bitmap < first_block || block_bitmap > last_block) { 2119b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 2120a9df9a49STheodore Ts'o "Block bitmap for group %u not in group " 2121b31e1552SEric Sandeen "(block %llu)!", i, block_bitmap); 2122ac27a0ecSDave Kleikamp return 0; 2123ac27a0ecSDave Kleikamp } 21248fadc143SAlexandre Ratchov inode_bitmap = ext4_inode_bitmap(sb, gdp); 21252b2d6d01STheodore Ts'o if (inode_bitmap < first_block || inode_bitmap > last_block) { 2126b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 2127a9df9a49STheodore Ts'o "Inode bitmap for group %u not in group " 2128b31e1552SEric Sandeen "(block %llu)!", i, inode_bitmap); 2129ac27a0ecSDave Kleikamp return 0; 2130ac27a0ecSDave Kleikamp } 21318fadc143SAlexandre Ratchov inode_table = ext4_inode_table(sb, gdp); 2132bd81d8eeSLaurent Vivier if (inode_table < first_block || 21332b2d6d01STheodore Ts'o inode_table + sbi->s_itb_per_group - 1 > last_block) { 2134b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 2135a9df9a49STheodore Ts'o "Inode table for group %u not in group " 2136b31e1552SEric Sandeen "(block %llu)!", i, inode_table); 2137ac27a0ecSDave Kleikamp return 0; 2138ac27a0ecSDave Kleikamp } 2139955ce5f5SAneesh Kumar K.V ext4_lock_group(sb, i); 2140717d50e4SAndreas Dilger if (!ext4_group_desc_csum_verify(sbi, i, gdp)) { 2141b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 2142b31e1552SEric Sandeen "Checksum for group %u failed (%u!=%u)", 2143fd2d4291SAvantika Mathur i, le16_to_cpu(ext4_group_desc_csum(sbi, i, 2144fd2d4291SAvantika Mathur gdp)), le16_to_cpu(gdp->bg_checksum)); 21457ee1ec4cSLi Zefan if (!(sb->s_flags & MS_RDONLY)) { 2146955ce5f5SAneesh Kumar K.V ext4_unlock_group(sb, i); 2147717d50e4SAndreas Dilger return 0; 2148717d50e4SAndreas Dilger } 21497ee1ec4cSLi Zefan } 2150955ce5f5SAneesh Kumar K.V ext4_unlock_group(sb, i); 2151ce421581SJose R. Santos if (!flexbg_flag) 2152617ba13bSMingming Cao first_block += EXT4_BLOCKS_PER_GROUP(sb); 2153ac27a0ecSDave Kleikamp } 2154bfff6873SLukas Czerner if (NULL != first_not_zeroed) 2155bfff6873SLukas Czerner *first_not_zeroed = grp; 2156ac27a0ecSDave Kleikamp 21575dee5437STheodore Ts'o ext4_free_blocks_count_set(sbi->s_es, 21585dee5437STheodore Ts'o EXT4_C2B(sbi, ext4_count_free_clusters(sb))); 2159617ba13bSMingming Cao sbi->s_es->s_free_inodes_count =cpu_to_le32(ext4_count_free_inodes(sb)); 2160ac27a0ecSDave Kleikamp return 1; 2161ac27a0ecSDave Kleikamp } 2162ac27a0ecSDave Kleikamp 2163617ba13bSMingming Cao /* ext4_orphan_cleanup() walks a singly-linked list of inodes (starting at 2164ac27a0ecSDave Kleikamp * the superblock) which were deleted from all directories, but held open by 2165ac27a0ecSDave Kleikamp * a process at the time of a crash. We walk the list and try to delete these 2166ac27a0ecSDave Kleikamp * inodes at recovery time (only with a read-write filesystem). 2167ac27a0ecSDave Kleikamp * 2168ac27a0ecSDave Kleikamp * In order to keep the orphan inode chain consistent during traversal (in 2169ac27a0ecSDave Kleikamp * case of crash during recovery), we link each inode into the superblock 2170ac27a0ecSDave Kleikamp * orphan list_head and handle it the same way as an inode deletion during 2171ac27a0ecSDave Kleikamp * normal operation (which journals the operations for us). 2172ac27a0ecSDave Kleikamp * 2173ac27a0ecSDave Kleikamp * We only do an iget() and an iput() on each inode, which is very safe if we 2174ac27a0ecSDave Kleikamp * accidentally point at an in-use or already deleted inode. The worst that 2175ac27a0ecSDave Kleikamp * can happen in this case is that we get a "bit already cleared" message from 2176617ba13bSMingming Cao * ext4_free_inode(). The only reason we would point at a wrong inode is if 2177ac27a0ecSDave Kleikamp * e2fsck was run on this filesystem, and it must have already done the orphan 2178ac27a0ecSDave Kleikamp * inode cleanup for us, so we can safely abort without any further action. 2179ac27a0ecSDave Kleikamp */ 2180617ba13bSMingming Cao static void ext4_orphan_cleanup(struct super_block *sb, 2181617ba13bSMingming Cao struct ext4_super_block *es) 2182ac27a0ecSDave Kleikamp { 2183ac27a0ecSDave Kleikamp unsigned int s_flags = sb->s_flags; 2184ac27a0ecSDave Kleikamp int nr_orphans = 0, nr_truncates = 0; 2185ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 2186ac27a0ecSDave Kleikamp int i; 2187ac27a0ecSDave Kleikamp #endif 2188ac27a0ecSDave Kleikamp if (!es->s_last_orphan) { 2189ac27a0ecSDave Kleikamp jbd_debug(4, "no orphan inodes to clean up\n"); 2190ac27a0ecSDave Kleikamp return; 2191ac27a0ecSDave Kleikamp } 2192ac27a0ecSDave Kleikamp 2193a8f48a95SEric Sandeen if (bdev_read_only(sb->s_bdev)) { 2194b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "write access " 2195b31e1552SEric Sandeen "unavailable, skipping orphan cleanup"); 2196a8f48a95SEric Sandeen return; 2197a8f48a95SEric Sandeen } 2198a8f48a95SEric Sandeen 2199d39195c3SAmir Goldstein /* Check if feature set would not allow a r/w mount */ 2200d39195c3SAmir Goldstein if (!ext4_feature_set_ok(sb, 0)) { 2201d39195c3SAmir Goldstein ext4_msg(sb, KERN_INFO, "Skipping orphan cleanup due to " 2202d39195c3SAmir Goldstein "unknown ROCOMPAT features"); 2203d39195c3SAmir Goldstein return; 2204d39195c3SAmir Goldstein } 2205d39195c3SAmir Goldstein 2206617ba13bSMingming Cao if (EXT4_SB(sb)->s_mount_state & EXT4_ERROR_FS) { 2207ac27a0ecSDave Kleikamp if (es->s_last_orphan) 2208ac27a0ecSDave Kleikamp jbd_debug(1, "Errors on filesystem, " 2209ac27a0ecSDave Kleikamp "clearing orphan list.\n"); 2210ac27a0ecSDave Kleikamp es->s_last_orphan = 0; 2211ac27a0ecSDave Kleikamp jbd_debug(1, "Skipping orphan recovery on fs with errors.\n"); 2212ac27a0ecSDave Kleikamp return; 2213ac27a0ecSDave Kleikamp } 2214ac27a0ecSDave Kleikamp 2215ac27a0ecSDave Kleikamp if (s_flags & MS_RDONLY) { 2216b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "orphan cleanup on readonly fs"); 2217ac27a0ecSDave Kleikamp sb->s_flags &= ~MS_RDONLY; 2218ac27a0ecSDave Kleikamp } 2219ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 2220ac27a0ecSDave Kleikamp /* Needed for iput() to work correctly and not trash data */ 2221ac27a0ecSDave Kleikamp sb->s_flags |= MS_ACTIVE; 2222ac27a0ecSDave Kleikamp /* Turn on quotas so that they are updated correctly */ 2223ac27a0ecSDave Kleikamp for (i = 0; i < MAXQUOTAS; i++) { 2224617ba13bSMingming Cao if (EXT4_SB(sb)->s_qf_names[i]) { 2225617ba13bSMingming Cao int ret = ext4_quota_on_mount(sb, i); 2226ac27a0ecSDave Kleikamp if (ret < 0) 2227b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 2228b31e1552SEric Sandeen "Cannot turn on journaled " 2229b31e1552SEric Sandeen "quota: error %d", ret); 2230ac27a0ecSDave Kleikamp } 2231ac27a0ecSDave Kleikamp } 2232ac27a0ecSDave Kleikamp #endif 2233ac27a0ecSDave Kleikamp 2234ac27a0ecSDave Kleikamp while (es->s_last_orphan) { 2235ac27a0ecSDave Kleikamp struct inode *inode; 2236ac27a0ecSDave Kleikamp 223797bd42b9SJosef Bacik inode = ext4_orphan_get(sb, le32_to_cpu(es->s_last_orphan)); 223897bd42b9SJosef Bacik if (IS_ERR(inode)) { 2239ac27a0ecSDave Kleikamp es->s_last_orphan = 0; 2240ac27a0ecSDave Kleikamp break; 2241ac27a0ecSDave Kleikamp } 2242ac27a0ecSDave Kleikamp 2243617ba13bSMingming Cao list_add(&EXT4_I(inode)->i_orphan, &EXT4_SB(sb)->s_orphan); 2244871a2931SChristoph Hellwig dquot_initialize(inode); 2245ac27a0ecSDave Kleikamp if (inode->i_nlink) { 2246b31e1552SEric Sandeen ext4_msg(sb, KERN_DEBUG, 2247b31e1552SEric Sandeen "%s: truncating inode %lu to %lld bytes", 224846e665e9SHarvey Harrison __func__, inode->i_ino, inode->i_size); 2249e5f8eab8STheodore Ts'o jbd_debug(2, "truncating inode %lu to %lld bytes\n", 2250ac27a0ecSDave Kleikamp inode->i_ino, inode->i_size); 2251617ba13bSMingming Cao ext4_truncate(inode); 2252ac27a0ecSDave Kleikamp nr_truncates++; 2253ac27a0ecSDave Kleikamp } else { 2254b31e1552SEric Sandeen ext4_msg(sb, KERN_DEBUG, 2255b31e1552SEric Sandeen "%s: deleting unreferenced inode %lu", 225646e665e9SHarvey Harrison __func__, inode->i_ino); 2257ac27a0ecSDave Kleikamp jbd_debug(2, "deleting unreferenced inode %lu\n", 2258ac27a0ecSDave Kleikamp inode->i_ino); 2259ac27a0ecSDave Kleikamp nr_orphans++; 2260ac27a0ecSDave Kleikamp } 2261ac27a0ecSDave Kleikamp iput(inode); /* The delete magic happens here! */ 2262ac27a0ecSDave Kleikamp } 2263ac27a0ecSDave Kleikamp 2264ac27a0ecSDave Kleikamp #define PLURAL(x) (x), ((x) == 1) ? "" : "s" 2265ac27a0ecSDave Kleikamp 2266ac27a0ecSDave Kleikamp if (nr_orphans) 2267b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "%d orphan inode%s deleted", 2268b31e1552SEric Sandeen PLURAL(nr_orphans)); 2269ac27a0ecSDave Kleikamp if (nr_truncates) 2270b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "%d truncate%s cleaned up", 2271b31e1552SEric Sandeen PLURAL(nr_truncates)); 2272ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 2273ac27a0ecSDave Kleikamp /* Turn quotas off */ 2274ac27a0ecSDave Kleikamp for (i = 0; i < MAXQUOTAS; i++) { 2275ac27a0ecSDave Kleikamp if (sb_dqopt(sb)->files[i]) 2276287a8095SChristoph Hellwig dquot_quota_off(sb, i); 2277ac27a0ecSDave Kleikamp } 2278ac27a0ecSDave Kleikamp #endif 2279ac27a0ecSDave Kleikamp sb->s_flags = s_flags; /* Restore MS_RDONLY status */ 2280ac27a0ecSDave Kleikamp } 22810b8e58a1SAndreas Dilger 2282cd2291a4SEric Sandeen /* 2283cd2291a4SEric Sandeen * Maximal extent format file size. 2284cd2291a4SEric Sandeen * Resulting logical blkno at s_maxbytes must fit in our on-disk 2285cd2291a4SEric Sandeen * extent format containers, within a sector_t, and within i_blocks 2286cd2291a4SEric Sandeen * in the vfs. ext4 inode has 48 bits of i_block in fsblock units, 2287cd2291a4SEric Sandeen * so that won't be a limiting factor. 2288cd2291a4SEric Sandeen * 2289f17722f9SLukas Czerner * However there is other limiting factor. We do store extents in the form 2290f17722f9SLukas Czerner * of starting block and length, hence the resulting length of the extent 2291f17722f9SLukas Czerner * covering maximum file size must fit into on-disk format containers as 2292f17722f9SLukas Czerner * well. Given that length is always by 1 unit bigger than max unit (because 2293f17722f9SLukas Czerner * we count 0 as well) we have to lower the s_maxbytes by one fs block. 2294f17722f9SLukas Czerner * 2295cd2291a4SEric Sandeen * Note, this does *not* consider any metadata overhead for vfs i_blocks. 2296cd2291a4SEric Sandeen */ 2297f287a1a5STheodore Ts'o static loff_t ext4_max_size(int blkbits, int has_huge_files) 2298cd2291a4SEric Sandeen { 2299cd2291a4SEric Sandeen loff_t res; 2300cd2291a4SEric Sandeen loff_t upper_limit = MAX_LFS_FILESIZE; 2301cd2291a4SEric Sandeen 2302cd2291a4SEric Sandeen /* small i_blocks in vfs inode? */ 2303f287a1a5STheodore Ts'o if (!has_huge_files || sizeof(blkcnt_t) < sizeof(u64)) { 2304cd2291a4SEric Sandeen /* 230590c699a9SBartlomiej Zolnierkiewicz * CONFIG_LBDAF is not enabled implies the inode 2306cd2291a4SEric Sandeen * i_block represent total blocks in 512 bytes 2307cd2291a4SEric Sandeen * 32 == size of vfs inode i_blocks * 8 2308cd2291a4SEric Sandeen */ 2309cd2291a4SEric Sandeen upper_limit = (1LL << 32) - 1; 2310cd2291a4SEric Sandeen 2311cd2291a4SEric Sandeen /* total blocks in file system block size */ 2312cd2291a4SEric Sandeen upper_limit >>= (blkbits - 9); 2313cd2291a4SEric Sandeen upper_limit <<= blkbits; 2314cd2291a4SEric Sandeen } 2315cd2291a4SEric Sandeen 2316f17722f9SLukas Czerner /* 2317f17722f9SLukas Czerner * 32-bit extent-start container, ee_block. We lower the maxbytes 2318f17722f9SLukas Czerner * by one fs block, so ee_len can cover the extent of maximum file 2319f17722f9SLukas Czerner * size 2320f17722f9SLukas Czerner */ 2321f17722f9SLukas Czerner res = (1LL << 32) - 1; 2322cd2291a4SEric Sandeen res <<= blkbits; 2323cd2291a4SEric Sandeen 2324cd2291a4SEric Sandeen /* Sanity check against vm- & vfs- imposed limits */ 2325cd2291a4SEric Sandeen if (res > upper_limit) 2326cd2291a4SEric Sandeen res = upper_limit; 2327cd2291a4SEric Sandeen 2328cd2291a4SEric Sandeen return res; 2329cd2291a4SEric Sandeen } 2330ac27a0ecSDave Kleikamp 2331ac27a0ecSDave Kleikamp /* 2332cd2291a4SEric Sandeen * Maximal bitmap file size. There is a direct, and {,double-,triple-}indirect 23330fc1b451SAneesh Kumar K.V * block limit, and also a limit of (2^48 - 1) 512-byte sectors in i_blocks. 23340fc1b451SAneesh Kumar K.V * We need to be 1 filesystem block less than the 2^48 sector limit. 2335ac27a0ecSDave Kleikamp */ 2336f287a1a5STheodore Ts'o static loff_t ext4_max_bitmap_size(int bits, int has_huge_files) 2337ac27a0ecSDave Kleikamp { 2338617ba13bSMingming Cao loff_t res = EXT4_NDIR_BLOCKS; 23390fc1b451SAneesh Kumar K.V int meta_blocks; 23400fc1b451SAneesh Kumar K.V loff_t upper_limit; 23410b8e58a1SAndreas Dilger /* This is calculated to be the largest file size for a dense, block 23420b8e58a1SAndreas Dilger * mapped file such that the file's total number of 512-byte sectors, 23430b8e58a1SAndreas Dilger * including data and all indirect blocks, does not exceed (2^48 - 1). 23440b8e58a1SAndreas Dilger * 23450b8e58a1SAndreas Dilger * __u32 i_blocks_lo and _u16 i_blocks_high represent the total 23460b8e58a1SAndreas Dilger * number of 512-byte sectors of the file. 23470fc1b451SAneesh Kumar K.V */ 23480fc1b451SAneesh Kumar K.V 2349f287a1a5STheodore Ts'o if (!has_huge_files || sizeof(blkcnt_t) < sizeof(u64)) { 23500fc1b451SAneesh Kumar K.V /* 235190c699a9SBartlomiej Zolnierkiewicz * !has_huge_files or CONFIG_LBDAF not enabled implies that 23520b8e58a1SAndreas Dilger * the inode i_block field represents total file blocks in 23530b8e58a1SAndreas Dilger * 2^32 512-byte sectors == size of vfs inode i_blocks * 8 23540fc1b451SAneesh Kumar K.V */ 23550fc1b451SAneesh Kumar K.V upper_limit = (1LL << 32) - 1; 23560fc1b451SAneesh Kumar K.V 23570fc1b451SAneesh Kumar K.V /* total blocks in file system block size */ 23580fc1b451SAneesh Kumar K.V upper_limit >>= (bits - 9); 23590fc1b451SAneesh Kumar K.V 23600fc1b451SAneesh Kumar K.V } else { 23618180a562SAneesh Kumar K.V /* 23628180a562SAneesh Kumar K.V * We use 48 bit ext4_inode i_blocks 23638180a562SAneesh Kumar K.V * With EXT4_HUGE_FILE_FL set the i_blocks 23648180a562SAneesh Kumar K.V * represent total number of blocks in 23658180a562SAneesh Kumar K.V * file system block size 23668180a562SAneesh Kumar K.V */ 23670fc1b451SAneesh Kumar K.V upper_limit = (1LL << 48) - 1; 23680fc1b451SAneesh Kumar K.V 23690fc1b451SAneesh Kumar K.V } 23700fc1b451SAneesh Kumar K.V 23710fc1b451SAneesh Kumar K.V /* indirect blocks */ 23720fc1b451SAneesh Kumar K.V meta_blocks = 1; 23730fc1b451SAneesh Kumar K.V /* double indirect blocks */ 23740fc1b451SAneesh Kumar K.V meta_blocks += 1 + (1LL << (bits-2)); 23750fc1b451SAneesh Kumar K.V /* tripple indirect blocks */ 23760fc1b451SAneesh Kumar K.V meta_blocks += 1 + (1LL << (bits-2)) + (1LL << (2*(bits-2))); 23770fc1b451SAneesh Kumar K.V 23780fc1b451SAneesh Kumar K.V upper_limit -= meta_blocks; 23790fc1b451SAneesh Kumar K.V upper_limit <<= bits; 2380ac27a0ecSDave Kleikamp 2381ac27a0ecSDave Kleikamp res += 1LL << (bits-2); 2382ac27a0ecSDave Kleikamp res += 1LL << (2*(bits-2)); 2383ac27a0ecSDave Kleikamp res += 1LL << (3*(bits-2)); 2384ac27a0ecSDave Kleikamp res <<= bits; 2385ac27a0ecSDave Kleikamp if (res > upper_limit) 2386ac27a0ecSDave Kleikamp res = upper_limit; 23870fc1b451SAneesh Kumar K.V 23880fc1b451SAneesh Kumar K.V if (res > MAX_LFS_FILESIZE) 23890fc1b451SAneesh Kumar K.V res = MAX_LFS_FILESIZE; 23900fc1b451SAneesh Kumar K.V 2391ac27a0ecSDave Kleikamp return res; 2392ac27a0ecSDave Kleikamp } 2393ac27a0ecSDave Kleikamp 2394617ba13bSMingming Cao static ext4_fsblk_t descriptor_loc(struct super_block *sb, 239570bbb3e0SAndrew Morton ext4_fsblk_t logical_sb_block, int nr) 2396ac27a0ecSDave Kleikamp { 2397617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 2398fd2d4291SAvantika Mathur ext4_group_t bg, first_meta_bg; 2399ac27a0ecSDave Kleikamp int has_super = 0; 2400ac27a0ecSDave Kleikamp 2401ac27a0ecSDave Kleikamp first_meta_bg = le32_to_cpu(sbi->s_es->s_first_meta_bg); 2402ac27a0ecSDave Kleikamp 2403617ba13bSMingming Cao if (!EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_META_BG) || 2404ac27a0ecSDave Kleikamp nr < first_meta_bg) 240570bbb3e0SAndrew Morton return logical_sb_block + nr + 1; 2406ac27a0ecSDave Kleikamp bg = sbi->s_desc_per_block * nr; 2407617ba13bSMingming Cao if (ext4_bg_has_super(sb, bg)) 2408ac27a0ecSDave Kleikamp has_super = 1; 24090b8e58a1SAndreas Dilger 2410617ba13bSMingming Cao return (has_super + ext4_group_first_block_no(sb, bg)); 2411ac27a0ecSDave Kleikamp } 2412ac27a0ecSDave Kleikamp 2413c9de560dSAlex Tomas /** 2414c9de560dSAlex Tomas * ext4_get_stripe_size: Get the stripe size. 2415c9de560dSAlex Tomas * @sbi: In memory super block info 2416c9de560dSAlex Tomas * 2417c9de560dSAlex Tomas * If we have specified it via mount option, then 2418c9de560dSAlex Tomas * use the mount option value. If the value specified at mount time is 2419c9de560dSAlex Tomas * greater than the blocks per group use the super block value. 2420c9de560dSAlex Tomas * If the super block value is greater than blocks per group return 0. 2421c9de560dSAlex Tomas * Allocator needs it be less than blocks per group. 2422c9de560dSAlex Tomas * 2423c9de560dSAlex Tomas */ 2424c9de560dSAlex Tomas static unsigned long ext4_get_stripe_size(struct ext4_sb_info *sbi) 2425c9de560dSAlex Tomas { 2426c9de560dSAlex Tomas unsigned long stride = le16_to_cpu(sbi->s_es->s_raid_stride); 2427c9de560dSAlex Tomas unsigned long stripe_width = 2428c9de560dSAlex Tomas le32_to_cpu(sbi->s_es->s_raid_stripe_width); 24293eb08658SDan Ehrenberg int ret; 2430c9de560dSAlex Tomas 2431c9de560dSAlex Tomas if (sbi->s_stripe && sbi->s_stripe <= sbi->s_blocks_per_group) 24323eb08658SDan Ehrenberg ret = sbi->s_stripe; 24333eb08658SDan Ehrenberg else if (stripe_width <= sbi->s_blocks_per_group) 24343eb08658SDan Ehrenberg ret = stripe_width; 24353eb08658SDan Ehrenberg else if (stride <= sbi->s_blocks_per_group) 24363eb08658SDan Ehrenberg ret = stride; 24373eb08658SDan Ehrenberg else 24383eb08658SDan Ehrenberg ret = 0; 2439c9de560dSAlex Tomas 24403eb08658SDan Ehrenberg /* 24413eb08658SDan Ehrenberg * If the stripe width is 1, this makes no sense and 24423eb08658SDan Ehrenberg * we set it to 0 to turn off stripe handling code. 24433eb08658SDan Ehrenberg */ 24443eb08658SDan Ehrenberg if (ret <= 1) 24453eb08658SDan Ehrenberg ret = 0; 2446c9de560dSAlex Tomas 24473eb08658SDan Ehrenberg return ret; 2448c9de560dSAlex Tomas } 2449ac27a0ecSDave Kleikamp 24503197ebdbSTheodore Ts'o /* sysfs supprt */ 24513197ebdbSTheodore Ts'o 24523197ebdbSTheodore Ts'o struct ext4_attr { 24533197ebdbSTheodore Ts'o struct attribute attr; 24543197ebdbSTheodore Ts'o ssize_t (*show)(struct ext4_attr *, struct ext4_sb_info *, char *); 24553197ebdbSTheodore Ts'o ssize_t (*store)(struct ext4_attr *, struct ext4_sb_info *, 24563197ebdbSTheodore Ts'o const char *, size_t); 24573197ebdbSTheodore Ts'o int offset; 24583197ebdbSTheodore Ts'o }; 24593197ebdbSTheodore Ts'o 24603197ebdbSTheodore Ts'o static int parse_strtoul(const char *buf, 24613197ebdbSTheodore Ts'o unsigned long max, unsigned long *value) 24623197ebdbSTheodore Ts'o { 24633197ebdbSTheodore Ts'o char *endp; 24643197ebdbSTheodore Ts'o 2465e7d2860bSAndré Goddard Rosa *value = simple_strtoul(skip_spaces(buf), &endp, 0); 2466e7d2860bSAndré Goddard Rosa endp = skip_spaces(endp); 24673197ebdbSTheodore Ts'o if (*endp || *value > max) 24683197ebdbSTheodore Ts'o return -EINVAL; 24693197ebdbSTheodore Ts'o 24703197ebdbSTheodore Ts'o return 0; 24713197ebdbSTheodore Ts'o } 24723197ebdbSTheodore Ts'o 24733197ebdbSTheodore Ts'o static ssize_t delayed_allocation_blocks_show(struct ext4_attr *a, 24743197ebdbSTheodore Ts'o struct ext4_sb_info *sbi, 24753197ebdbSTheodore Ts'o char *buf) 24763197ebdbSTheodore Ts'o { 24773197ebdbSTheodore Ts'o return snprintf(buf, PAGE_SIZE, "%llu\n", 24787b415bf6SAditya Kali (s64) EXT4_C2B(sbi, 24797b415bf6SAditya Kali percpu_counter_sum(&sbi->s_dirtyclusters_counter))); 24803197ebdbSTheodore Ts'o } 24813197ebdbSTheodore Ts'o 24823197ebdbSTheodore Ts'o static ssize_t session_write_kbytes_show(struct ext4_attr *a, 24833197ebdbSTheodore Ts'o struct ext4_sb_info *sbi, char *buf) 24843197ebdbSTheodore Ts'o { 24853197ebdbSTheodore Ts'o struct super_block *sb = sbi->s_buddy_cache->i_sb; 24863197ebdbSTheodore Ts'o 2487f613dfcbSTheodore Ts'o if (!sb->s_bdev->bd_part) 2488f613dfcbSTheodore Ts'o return snprintf(buf, PAGE_SIZE, "0\n"); 24893197ebdbSTheodore Ts'o return snprintf(buf, PAGE_SIZE, "%lu\n", 24903197ebdbSTheodore Ts'o (part_stat_read(sb->s_bdev->bd_part, sectors[1]) - 24913197ebdbSTheodore Ts'o sbi->s_sectors_written_start) >> 1); 24923197ebdbSTheodore Ts'o } 24933197ebdbSTheodore Ts'o 24943197ebdbSTheodore Ts'o static ssize_t lifetime_write_kbytes_show(struct ext4_attr *a, 24953197ebdbSTheodore Ts'o struct ext4_sb_info *sbi, char *buf) 24963197ebdbSTheodore Ts'o { 24973197ebdbSTheodore Ts'o struct super_block *sb = sbi->s_buddy_cache->i_sb; 24983197ebdbSTheodore Ts'o 2499f613dfcbSTheodore Ts'o if (!sb->s_bdev->bd_part) 2500f613dfcbSTheodore Ts'o return snprintf(buf, PAGE_SIZE, "0\n"); 25013197ebdbSTheodore Ts'o return snprintf(buf, PAGE_SIZE, "%llu\n", 2502a6b43e38SAndrew Morton (unsigned long long)(sbi->s_kbytes_written + 25033197ebdbSTheodore Ts'o ((part_stat_read(sb->s_bdev->bd_part, sectors[1]) - 2504a6b43e38SAndrew Morton EXT4_SB(sb)->s_sectors_written_start) >> 1))); 25053197ebdbSTheodore Ts'o } 25063197ebdbSTheodore Ts'o 250777f4135fSVivek Haldar static ssize_t extent_cache_hits_show(struct ext4_attr *a, 250877f4135fSVivek Haldar struct ext4_sb_info *sbi, char *buf) 250977f4135fSVivek Haldar { 251077f4135fSVivek Haldar return snprintf(buf, PAGE_SIZE, "%lu\n", sbi->extent_cache_hits); 251177f4135fSVivek Haldar } 251277f4135fSVivek Haldar 251377f4135fSVivek Haldar static ssize_t extent_cache_misses_show(struct ext4_attr *a, 251477f4135fSVivek Haldar struct ext4_sb_info *sbi, char *buf) 251577f4135fSVivek Haldar { 251677f4135fSVivek Haldar return snprintf(buf, PAGE_SIZE, "%lu\n", sbi->extent_cache_misses); 251777f4135fSVivek Haldar } 251877f4135fSVivek Haldar 25193197ebdbSTheodore Ts'o static ssize_t inode_readahead_blks_store(struct ext4_attr *a, 25203197ebdbSTheodore Ts'o struct ext4_sb_info *sbi, 25213197ebdbSTheodore Ts'o const char *buf, size_t count) 25223197ebdbSTheodore Ts'o { 25233197ebdbSTheodore Ts'o unsigned long t; 25243197ebdbSTheodore Ts'o 25253197ebdbSTheodore Ts'o if (parse_strtoul(buf, 0x40000000, &t)) 25263197ebdbSTheodore Ts'o return -EINVAL; 25273197ebdbSTheodore Ts'o 25285dbd571dSAlexander V. Lukyanov if (t && !is_power_of_2(t)) 25293197ebdbSTheodore Ts'o return -EINVAL; 25303197ebdbSTheodore Ts'o 25313197ebdbSTheodore Ts'o sbi->s_inode_readahead_blks = t; 25323197ebdbSTheodore Ts'o return count; 25333197ebdbSTheodore Ts'o } 25343197ebdbSTheodore Ts'o 25353197ebdbSTheodore Ts'o static ssize_t sbi_ui_show(struct ext4_attr *a, 25363197ebdbSTheodore Ts'o struct ext4_sb_info *sbi, char *buf) 25373197ebdbSTheodore Ts'o { 25383197ebdbSTheodore Ts'o unsigned int *ui = (unsigned int *) (((char *) sbi) + a->offset); 25393197ebdbSTheodore Ts'o 25403197ebdbSTheodore Ts'o return snprintf(buf, PAGE_SIZE, "%u\n", *ui); 25413197ebdbSTheodore Ts'o } 25423197ebdbSTheodore Ts'o 25433197ebdbSTheodore Ts'o static ssize_t sbi_ui_store(struct ext4_attr *a, 25443197ebdbSTheodore Ts'o struct ext4_sb_info *sbi, 25453197ebdbSTheodore Ts'o const char *buf, size_t count) 25463197ebdbSTheodore Ts'o { 25473197ebdbSTheodore Ts'o unsigned int *ui = (unsigned int *) (((char *) sbi) + a->offset); 25483197ebdbSTheodore Ts'o unsigned long t; 25493197ebdbSTheodore Ts'o 25503197ebdbSTheodore Ts'o if (parse_strtoul(buf, 0xffffffff, &t)) 25513197ebdbSTheodore Ts'o return -EINVAL; 25523197ebdbSTheodore Ts'o *ui = t; 25533197ebdbSTheodore Ts'o return count; 25543197ebdbSTheodore Ts'o } 25553197ebdbSTheodore Ts'o 25563197ebdbSTheodore Ts'o #define EXT4_ATTR_OFFSET(_name,_mode,_show,_store,_elname) \ 25573197ebdbSTheodore Ts'o static struct ext4_attr ext4_attr_##_name = { \ 25583197ebdbSTheodore Ts'o .attr = {.name = __stringify(_name), .mode = _mode }, \ 25593197ebdbSTheodore Ts'o .show = _show, \ 25603197ebdbSTheodore Ts'o .store = _store, \ 25613197ebdbSTheodore Ts'o .offset = offsetof(struct ext4_sb_info, _elname), \ 25623197ebdbSTheodore Ts'o } 25633197ebdbSTheodore Ts'o #define EXT4_ATTR(name, mode, show, store) \ 25643197ebdbSTheodore Ts'o static struct ext4_attr ext4_attr_##name = __ATTR(name, mode, show, store) 25653197ebdbSTheodore Ts'o 2566857ac889SLukas Czerner #define EXT4_INFO_ATTR(name) EXT4_ATTR(name, 0444, NULL, NULL) 25673197ebdbSTheodore Ts'o #define EXT4_RO_ATTR(name) EXT4_ATTR(name, 0444, name##_show, NULL) 25683197ebdbSTheodore Ts'o #define EXT4_RW_ATTR(name) EXT4_ATTR(name, 0644, name##_show, name##_store) 25693197ebdbSTheodore Ts'o #define EXT4_RW_ATTR_SBI_UI(name, elname) \ 25703197ebdbSTheodore Ts'o EXT4_ATTR_OFFSET(name, 0644, sbi_ui_show, sbi_ui_store, elname) 25713197ebdbSTheodore Ts'o #define ATTR_LIST(name) &ext4_attr_##name.attr 25723197ebdbSTheodore Ts'o 25733197ebdbSTheodore Ts'o EXT4_RO_ATTR(delayed_allocation_blocks); 25743197ebdbSTheodore Ts'o EXT4_RO_ATTR(session_write_kbytes); 25753197ebdbSTheodore Ts'o EXT4_RO_ATTR(lifetime_write_kbytes); 257677f4135fSVivek Haldar EXT4_RO_ATTR(extent_cache_hits); 257777f4135fSVivek Haldar EXT4_RO_ATTR(extent_cache_misses); 25783197ebdbSTheodore Ts'o EXT4_ATTR_OFFSET(inode_readahead_blks, 0644, sbi_ui_show, 25793197ebdbSTheodore Ts'o inode_readahead_blks_store, s_inode_readahead_blks); 258011013911SAndreas Dilger EXT4_RW_ATTR_SBI_UI(inode_goal, s_inode_goal); 25813197ebdbSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(mb_stats, s_mb_stats); 25823197ebdbSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(mb_max_to_scan, s_mb_max_to_scan); 25833197ebdbSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(mb_min_to_scan, s_mb_min_to_scan); 25843197ebdbSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(mb_order2_req, s_mb_order2_reqs); 25853197ebdbSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(mb_stream_req, s_mb_stream_request); 25863197ebdbSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(mb_group_prealloc, s_mb_group_prealloc); 258755138e0bSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(max_writeback_mb_bump, s_max_writeback_mb_bump); 25883197ebdbSTheodore Ts'o 25893197ebdbSTheodore Ts'o static struct attribute *ext4_attrs[] = { 25903197ebdbSTheodore Ts'o ATTR_LIST(delayed_allocation_blocks), 25913197ebdbSTheodore Ts'o ATTR_LIST(session_write_kbytes), 25923197ebdbSTheodore Ts'o ATTR_LIST(lifetime_write_kbytes), 259377f4135fSVivek Haldar ATTR_LIST(extent_cache_hits), 259477f4135fSVivek Haldar ATTR_LIST(extent_cache_misses), 25953197ebdbSTheodore Ts'o ATTR_LIST(inode_readahead_blks), 259611013911SAndreas Dilger ATTR_LIST(inode_goal), 25973197ebdbSTheodore Ts'o ATTR_LIST(mb_stats), 25983197ebdbSTheodore Ts'o ATTR_LIST(mb_max_to_scan), 25993197ebdbSTheodore Ts'o ATTR_LIST(mb_min_to_scan), 26003197ebdbSTheodore Ts'o ATTR_LIST(mb_order2_req), 26013197ebdbSTheodore Ts'o ATTR_LIST(mb_stream_req), 26023197ebdbSTheodore Ts'o ATTR_LIST(mb_group_prealloc), 260355138e0bSTheodore Ts'o ATTR_LIST(max_writeback_mb_bump), 26043197ebdbSTheodore Ts'o NULL, 26053197ebdbSTheodore Ts'o }; 26063197ebdbSTheodore Ts'o 2607857ac889SLukas Czerner /* Features this copy of ext4 supports */ 2608857ac889SLukas Czerner EXT4_INFO_ATTR(lazy_itable_init); 260927ee40dfSLukas Czerner EXT4_INFO_ATTR(batched_discard); 2610857ac889SLukas Czerner 2611857ac889SLukas Czerner static struct attribute *ext4_feat_attrs[] = { 2612857ac889SLukas Czerner ATTR_LIST(lazy_itable_init), 261327ee40dfSLukas Czerner ATTR_LIST(batched_discard), 2614857ac889SLukas Czerner NULL, 2615857ac889SLukas Czerner }; 2616857ac889SLukas Czerner 26173197ebdbSTheodore Ts'o static ssize_t ext4_attr_show(struct kobject *kobj, 26183197ebdbSTheodore Ts'o struct attribute *attr, char *buf) 26193197ebdbSTheodore Ts'o { 26203197ebdbSTheodore Ts'o struct ext4_sb_info *sbi = container_of(kobj, struct ext4_sb_info, 26213197ebdbSTheodore Ts'o s_kobj); 26223197ebdbSTheodore Ts'o struct ext4_attr *a = container_of(attr, struct ext4_attr, attr); 26233197ebdbSTheodore Ts'o 26243197ebdbSTheodore Ts'o return a->show ? a->show(a, sbi, buf) : 0; 26253197ebdbSTheodore Ts'o } 26263197ebdbSTheodore Ts'o 26273197ebdbSTheodore Ts'o static ssize_t ext4_attr_store(struct kobject *kobj, 26283197ebdbSTheodore Ts'o struct attribute *attr, 26293197ebdbSTheodore Ts'o const char *buf, size_t len) 26303197ebdbSTheodore Ts'o { 26313197ebdbSTheodore Ts'o struct ext4_sb_info *sbi = container_of(kobj, struct ext4_sb_info, 26323197ebdbSTheodore Ts'o s_kobj); 26333197ebdbSTheodore Ts'o struct ext4_attr *a = container_of(attr, struct ext4_attr, attr); 26343197ebdbSTheodore Ts'o 26353197ebdbSTheodore Ts'o return a->store ? a->store(a, sbi, buf, len) : 0; 26363197ebdbSTheodore Ts'o } 26373197ebdbSTheodore Ts'o 26383197ebdbSTheodore Ts'o static void ext4_sb_release(struct kobject *kobj) 26393197ebdbSTheodore Ts'o { 26403197ebdbSTheodore Ts'o struct ext4_sb_info *sbi = container_of(kobj, struct ext4_sb_info, 26413197ebdbSTheodore Ts'o s_kobj); 26423197ebdbSTheodore Ts'o complete(&sbi->s_kobj_unregister); 26433197ebdbSTheodore Ts'o } 26443197ebdbSTheodore Ts'o 264552cf25d0SEmese Revfy static const struct sysfs_ops ext4_attr_ops = { 26463197ebdbSTheodore Ts'o .show = ext4_attr_show, 26473197ebdbSTheodore Ts'o .store = ext4_attr_store, 26483197ebdbSTheodore Ts'o }; 26493197ebdbSTheodore Ts'o 26503197ebdbSTheodore Ts'o static struct kobj_type ext4_ktype = { 26513197ebdbSTheodore Ts'o .default_attrs = ext4_attrs, 26523197ebdbSTheodore Ts'o .sysfs_ops = &ext4_attr_ops, 26533197ebdbSTheodore Ts'o .release = ext4_sb_release, 26543197ebdbSTheodore Ts'o }; 26553197ebdbSTheodore Ts'o 2656857ac889SLukas Czerner static void ext4_feat_release(struct kobject *kobj) 2657857ac889SLukas Czerner { 2658857ac889SLukas Czerner complete(&ext4_feat->f_kobj_unregister); 2659857ac889SLukas Czerner } 2660857ac889SLukas Czerner 2661857ac889SLukas Czerner static struct kobj_type ext4_feat_ktype = { 2662857ac889SLukas Czerner .default_attrs = ext4_feat_attrs, 2663857ac889SLukas Czerner .sysfs_ops = &ext4_attr_ops, 2664857ac889SLukas Czerner .release = ext4_feat_release, 2665857ac889SLukas Czerner }; 2666857ac889SLukas Czerner 2667a13fb1a4SEric Sandeen /* 2668a13fb1a4SEric Sandeen * Check whether this filesystem can be mounted based on 2669a13fb1a4SEric Sandeen * the features present and the RDONLY/RDWR mount requested. 2670a13fb1a4SEric Sandeen * Returns 1 if this filesystem can be mounted as requested, 2671a13fb1a4SEric Sandeen * 0 if it cannot be. 2672a13fb1a4SEric Sandeen */ 2673a13fb1a4SEric Sandeen static int ext4_feature_set_ok(struct super_block *sb, int readonly) 2674a13fb1a4SEric Sandeen { 2675a13fb1a4SEric Sandeen if (EXT4_HAS_INCOMPAT_FEATURE(sb, ~EXT4_FEATURE_INCOMPAT_SUPP)) { 2676a13fb1a4SEric Sandeen ext4_msg(sb, KERN_ERR, 2677a13fb1a4SEric Sandeen "Couldn't mount because of " 2678a13fb1a4SEric Sandeen "unsupported optional features (%x)", 2679a13fb1a4SEric Sandeen (le32_to_cpu(EXT4_SB(sb)->s_es->s_feature_incompat) & 2680a13fb1a4SEric Sandeen ~EXT4_FEATURE_INCOMPAT_SUPP)); 2681a13fb1a4SEric Sandeen return 0; 2682a13fb1a4SEric Sandeen } 2683a13fb1a4SEric Sandeen 2684a13fb1a4SEric Sandeen if (readonly) 2685a13fb1a4SEric Sandeen return 1; 2686a13fb1a4SEric Sandeen 2687a13fb1a4SEric Sandeen /* Check that feature set is OK for a read-write mount */ 2688a13fb1a4SEric Sandeen if (EXT4_HAS_RO_COMPAT_FEATURE(sb, ~EXT4_FEATURE_RO_COMPAT_SUPP)) { 2689a13fb1a4SEric Sandeen ext4_msg(sb, KERN_ERR, "couldn't mount RDWR because of " 2690a13fb1a4SEric Sandeen "unsupported optional features (%x)", 2691a13fb1a4SEric Sandeen (le32_to_cpu(EXT4_SB(sb)->s_es->s_feature_ro_compat) & 2692a13fb1a4SEric Sandeen ~EXT4_FEATURE_RO_COMPAT_SUPP)); 2693a13fb1a4SEric Sandeen return 0; 2694a13fb1a4SEric Sandeen } 2695a13fb1a4SEric Sandeen /* 2696a13fb1a4SEric Sandeen * Large file size enabled file system can only be mounted 2697a13fb1a4SEric Sandeen * read-write on 32-bit systems if kernel is built with CONFIG_LBDAF 2698a13fb1a4SEric Sandeen */ 2699a13fb1a4SEric Sandeen if (EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_HUGE_FILE)) { 2700a13fb1a4SEric Sandeen if (sizeof(blkcnt_t) < sizeof(u64)) { 2701a13fb1a4SEric Sandeen ext4_msg(sb, KERN_ERR, "Filesystem with huge files " 2702a13fb1a4SEric Sandeen "cannot be mounted RDWR without " 2703a13fb1a4SEric Sandeen "CONFIG_LBDAF"); 2704a13fb1a4SEric Sandeen return 0; 2705a13fb1a4SEric Sandeen } 2706a13fb1a4SEric Sandeen } 2707bab08ab9STheodore Ts'o if (EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_BIGALLOC) && 2708bab08ab9STheodore Ts'o !EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_EXTENTS)) { 2709bab08ab9STheodore Ts'o ext4_msg(sb, KERN_ERR, 2710bab08ab9STheodore Ts'o "Can't support bigalloc feature without " 2711bab08ab9STheodore Ts'o "extents feature\n"); 2712bab08ab9STheodore Ts'o return 0; 2713bab08ab9STheodore Ts'o } 2714a13fb1a4SEric Sandeen return 1; 2715a13fb1a4SEric Sandeen } 2716a13fb1a4SEric Sandeen 271766e61a9eSTheodore Ts'o /* 271866e61a9eSTheodore Ts'o * This function is called once a day if we have errors logged 271966e61a9eSTheodore Ts'o * on the file system 272066e61a9eSTheodore Ts'o */ 272166e61a9eSTheodore Ts'o static void print_daily_error_info(unsigned long arg) 272266e61a9eSTheodore Ts'o { 272366e61a9eSTheodore Ts'o struct super_block *sb = (struct super_block *) arg; 272466e61a9eSTheodore Ts'o struct ext4_sb_info *sbi; 272566e61a9eSTheodore Ts'o struct ext4_super_block *es; 272666e61a9eSTheodore Ts'o 272766e61a9eSTheodore Ts'o sbi = EXT4_SB(sb); 272866e61a9eSTheodore Ts'o es = sbi->s_es; 272966e61a9eSTheodore Ts'o 273066e61a9eSTheodore Ts'o if (es->s_error_count) 273166e61a9eSTheodore Ts'o ext4_msg(sb, KERN_NOTICE, "error count: %u", 273266e61a9eSTheodore Ts'o le32_to_cpu(es->s_error_count)); 273366e61a9eSTheodore Ts'o if (es->s_first_error_time) { 273466e61a9eSTheodore Ts'o printk(KERN_NOTICE "EXT4-fs (%s): initial error at %u: %.*s:%d", 273566e61a9eSTheodore Ts'o sb->s_id, le32_to_cpu(es->s_first_error_time), 273666e61a9eSTheodore Ts'o (int) sizeof(es->s_first_error_func), 273766e61a9eSTheodore Ts'o es->s_first_error_func, 273866e61a9eSTheodore Ts'o le32_to_cpu(es->s_first_error_line)); 273966e61a9eSTheodore Ts'o if (es->s_first_error_ino) 274066e61a9eSTheodore Ts'o printk(": inode %u", 274166e61a9eSTheodore Ts'o le32_to_cpu(es->s_first_error_ino)); 274266e61a9eSTheodore Ts'o if (es->s_first_error_block) 274366e61a9eSTheodore Ts'o printk(": block %llu", (unsigned long long) 274466e61a9eSTheodore Ts'o le64_to_cpu(es->s_first_error_block)); 274566e61a9eSTheodore Ts'o printk("\n"); 274666e61a9eSTheodore Ts'o } 274766e61a9eSTheodore Ts'o if (es->s_last_error_time) { 274866e61a9eSTheodore Ts'o printk(KERN_NOTICE "EXT4-fs (%s): last error at %u: %.*s:%d", 274966e61a9eSTheodore Ts'o sb->s_id, le32_to_cpu(es->s_last_error_time), 275066e61a9eSTheodore Ts'o (int) sizeof(es->s_last_error_func), 275166e61a9eSTheodore Ts'o es->s_last_error_func, 275266e61a9eSTheodore Ts'o le32_to_cpu(es->s_last_error_line)); 275366e61a9eSTheodore Ts'o if (es->s_last_error_ino) 275466e61a9eSTheodore Ts'o printk(": inode %u", 275566e61a9eSTheodore Ts'o le32_to_cpu(es->s_last_error_ino)); 275666e61a9eSTheodore Ts'o if (es->s_last_error_block) 275766e61a9eSTheodore Ts'o printk(": block %llu", (unsigned long long) 275866e61a9eSTheodore Ts'o le64_to_cpu(es->s_last_error_block)); 275966e61a9eSTheodore Ts'o printk("\n"); 276066e61a9eSTheodore Ts'o } 276166e61a9eSTheodore Ts'o mod_timer(&sbi->s_err_report, jiffies + 24*60*60*HZ); /* Once a day */ 276266e61a9eSTheodore Ts'o } 276366e61a9eSTheodore Ts'o 2764bfff6873SLukas Czerner /* Find next suitable group and run ext4_init_inode_table */ 2765bfff6873SLukas Czerner static int ext4_run_li_request(struct ext4_li_request *elr) 2766bfff6873SLukas Czerner { 2767bfff6873SLukas Czerner struct ext4_group_desc *gdp = NULL; 2768bfff6873SLukas Czerner ext4_group_t group, ngroups; 2769bfff6873SLukas Czerner struct super_block *sb; 2770bfff6873SLukas Czerner unsigned long timeout = 0; 2771bfff6873SLukas Czerner int ret = 0; 2772bfff6873SLukas Czerner 2773bfff6873SLukas Czerner sb = elr->lr_super; 2774bfff6873SLukas Czerner ngroups = EXT4_SB(sb)->s_groups_count; 2775bfff6873SLukas Czerner 2776bfff6873SLukas Czerner for (group = elr->lr_next_group; group < ngroups; group++) { 2777bfff6873SLukas Czerner gdp = ext4_get_group_desc(sb, group, NULL); 2778bfff6873SLukas Czerner if (!gdp) { 2779bfff6873SLukas Czerner ret = 1; 2780bfff6873SLukas Czerner break; 2781bfff6873SLukas Czerner } 2782bfff6873SLukas Czerner 2783bfff6873SLukas Czerner if (!(gdp->bg_flags & cpu_to_le16(EXT4_BG_INODE_ZEROED))) 2784bfff6873SLukas Czerner break; 2785bfff6873SLukas Czerner } 2786bfff6873SLukas Czerner 2787bfff6873SLukas Czerner if (group == ngroups) 2788bfff6873SLukas Czerner ret = 1; 2789bfff6873SLukas Czerner 2790bfff6873SLukas Czerner if (!ret) { 2791bfff6873SLukas Czerner timeout = jiffies; 2792bfff6873SLukas Czerner ret = ext4_init_inode_table(sb, group, 2793bfff6873SLukas Czerner elr->lr_timeout ? 0 : 1); 2794bfff6873SLukas Czerner if (elr->lr_timeout == 0) { 279551ce6511SLukas Czerner timeout = (jiffies - timeout) * 279651ce6511SLukas Czerner elr->lr_sbi->s_li_wait_mult; 2797bfff6873SLukas Czerner elr->lr_timeout = timeout; 2798bfff6873SLukas Czerner } 2799bfff6873SLukas Czerner elr->lr_next_sched = jiffies + elr->lr_timeout; 2800bfff6873SLukas Czerner elr->lr_next_group = group + 1; 2801bfff6873SLukas Czerner } 2802bfff6873SLukas Czerner 2803bfff6873SLukas Czerner return ret; 2804bfff6873SLukas Czerner } 2805bfff6873SLukas Czerner 2806bfff6873SLukas Czerner /* 2807bfff6873SLukas Czerner * Remove lr_request from the list_request and free the 28084ed5c033SLukas Czerner * request structure. Should be called with li_list_mtx held 2809bfff6873SLukas Czerner */ 2810bfff6873SLukas Czerner static void ext4_remove_li_request(struct ext4_li_request *elr) 2811bfff6873SLukas Czerner { 2812bfff6873SLukas Czerner struct ext4_sb_info *sbi; 2813bfff6873SLukas Czerner 2814bfff6873SLukas Czerner if (!elr) 2815bfff6873SLukas Czerner return; 2816bfff6873SLukas Czerner 2817bfff6873SLukas Czerner sbi = elr->lr_sbi; 2818bfff6873SLukas Czerner 2819bfff6873SLukas Czerner list_del(&elr->lr_request); 2820bfff6873SLukas Czerner sbi->s_li_request = NULL; 2821bfff6873SLukas Czerner kfree(elr); 2822bfff6873SLukas Czerner } 2823bfff6873SLukas Czerner 2824bfff6873SLukas Czerner static void ext4_unregister_li_request(struct super_block *sb) 2825bfff6873SLukas Czerner { 28261bb933fbSLukas Czerner mutex_lock(&ext4_li_mtx); 28271bb933fbSLukas Czerner if (!ext4_li_info) { 28281bb933fbSLukas Czerner mutex_unlock(&ext4_li_mtx); 2829bfff6873SLukas Czerner return; 28301bb933fbSLukas Czerner } 2831bfff6873SLukas Czerner 2832bfff6873SLukas Czerner mutex_lock(&ext4_li_info->li_list_mtx); 28331bb933fbSLukas Czerner ext4_remove_li_request(EXT4_SB(sb)->s_li_request); 2834bfff6873SLukas Czerner mutex_unlock(&ext4_li_info->li_list_mtx); 28351bb933fbSLukas Czerner mutex_unlock(&ext4_li_mtx); 2836bfff6873SLukas Czerner } 2837bfff6873SLukas Czerner 28388f1f7453SEric Sandeen static struct task_struct *ext4_lazyinit_task; 28398f1f7453SEric Sandeen 2840bfff6873SLukas Czerner /* 2841bfff6873SLukas Czerner * This is the function where ext4lazyinit thread lives. It walks 2842bfff6873SLukas Czerner * through the request list searching for next scheduled filesystem. 2843bfff6873SLukas Czerner * When such a fs is found, run the lazy initialization request 2844bfff6873SLukas Czerner * (ext4_rn_li_request) and keep track of the time spend in this 2845bfff6873SLukas Czerner * function. Based on that time we compute next schedule time of 2846bfff6873SLukas Czerner * the request. When walking through the list is complete, compute 2847bfff6873SLukas Czerner * next waking time and put itself into sleep. 2848bfff6873SLukas Czerner */ 2849bfff6873SLukas Czerner static int ext4_lazyinit_thread(void *arg) 2850bfff6873SLukas Czerner { 2851bfff6873SLukas Czerner struct ext4_lazy_init *eli = (struct ext4_lazy_init *)arg; 2852bfff6873SLukas Czerner struct list_head *pos, *n; 2853bfff6873SLukas Czerner struct ext4_li_request *elr; 28544ed5c033SLukas Czerner unsigned long next_wakeup, cur; 2855bfff6873SLukas Czerner 2856bfff6873SLukas Czerner BUG_ON(NULL == eli); 2857bfff6873SLukas Czerner 2858bfff6873SLukas Czerner cont_thread: 2859bfff6873SLukas Czerner while (true) { 2860bfff6873SLukas Czerner next_wakeup = MAX_JIFFY_OFFSET; 2861bfff6873SLukas Czerner 2862bfff6873SLukas Czerner mutex_lock(&eli->li_list_mtx); 2863bfff6873SLukas Czerner if (list_empty(&eli->li_request_list)) { 2864bfff6873SLukas Czerner mutex_unlock(&eli->li_list_mtx); 2865bfff6873SLukas Czerner goto exit_thread; 2866bfff6873SLukas Czerner } 2867bfff6873SLukas Czerner 2868bfff6873SLukas Czerner list_for_each_safe(pos, n, &eli->li_request_list) { 2869bfff6873SLukas Czerner elr = list_entry(pos, struct ext4_li_request, 2870bfff6873SLukas Czerner lr_request); 2871bfff6873SLukas Czerner 2872b2c78cd0STheodore Ts'o if (time_after_eq(jiffies, elr->lr_next_sched)) { 2873b2c78cd0STheodore Ts'o if (ext4_run_li_request(elr) != 0) { 2874b2c78cd0STheodore Ts'o /* error, remove the lazy_init job */ 2875bfff6873SLukas Czerner ext4_remove_li_request(elr); 2876bfff6873SLukas Czerner continue; 2877bfff6873SLukas Czerner } 2878b2c78cd0STheodore Ts'o } 2879bfff6873SLukas Czerner 2880bfff6873SLukas Czerner if (time_before(elr->lr_next_sched, next_wakeup)) 2881bfff6873SLukas Czerner next_wakeup = elr->lr_next_sched; 2882bfff6873SLukas Czerner } 2883bfff6873SLukas Czerner mutex_unlock(&eli->li_list_mtx); 2884bfff6873SLukas Czerner 2885bfff6873SLukas Czerner if (freezing(current)) 2886bfff6873SLukas Czerner refrigerator(); 2887bfff6873SLukas Czerner 28884ed5c033SLukas Czerner cur = jiffies; 28894ed5c033SLukas Czerner if ((time_after_eq(cur, next_wakeup)) || 2890f4245bd4SLukas Czerner (MAX_JIFFY_OFFSET == next_wakeup)) { 2891bfff6873SLukas Czerner cond_resched(); 2892bfff6873SLukas Czerner continue; 2893bfff6873SLukas Czerner } 2894bfff6873SLukas Czerner 28954ed5c033SLukas Czerner schedule_timeout_interruptible(next_wakeup - cur); 28964ed5c033SLukas Czerner 28978f1f7453SEric Sandeen if (kthread_should_stop()) { 28988f1f7453SEric Sandeen ext4_clear_request_list(); 28998f1f7453SEric Sandeen goto exit_thread; 29008f1f7453SEric Sandeen } 2901bfff6873SLukas Czerner } 2902bfff6873SLukas Czerner 2903bfff6873SLukas Czerner exit_thread: 2904bfff6873SLukas Czerner /* 2905bfff6873SLukas Czerner * It looks like the request list is empty, but we need 2906bfff6873SLukas Czerner * to check it under the li_list_mtx lock, to prevent any 2907bfff6873SLukas Czerner * additions into it, and of course we should lock ext4_li_mtx 2908bfff6873SLukas Czerner * to atomically free the list and ext4_li_info, because at 2909bfff6873SLukas Czerner * this point another ext4 filesystem could be registering 2910bfff6873SLukas Czerner * new one. 2911bfff6873SLukas Czerner */ 2912bfff6873SLukas Czerner mutex_lock(&ext4_li_mtx); 2913bfff6873SLukas Czerner mutex_lock(&eli->li_list_mtx); 2914bfff6873SLukas Czerner if (!list_empty(&eli->li_request_list)) { 2915bfff6873SLukas Czerner mutex_unlock(&eli->li_list_mtx); 2916bfff6873SLukas Czerner mutex_unlock(&ext4_li_mtx); 2917bfff6873SLukas Czerner goto cont_thread; 2918bfff6873SLukas Czerner } 2919bfff6873SLukas Czerner mutex_unlock(&eli->li_list_mtx); 2920bfff6873SLukas Czerner kfree(ext4_li_info); 2921bfff6873SLukas Czerner ext4_li_info = NULL; 2922bfff6873SLukas Czerner mutex_unlock(&ext4_li_mtx); 2923bfff6873SLukas Czerner 2924bfff6873SLukas Czerner return 0; 2925bfff6873SLukas Czerner } 2926bfff6873SLukas Czerner 2927bfff6873SLukas Czerner static void ext4_clear_request_list(void) 2928bfff6873SLukas Czerner { 2929bfff6873SLukas Czerner struct list_head *pos, *n; 2930bfff6873SLukas Czerner struct ext4_li_request *elr; 2931bfff6873SLukas Czerner 2932bfff6873SLukas Czerner mutex_lock(&ext4_li_info->li_list_mtx); 2933bfff6873SLukas Czerner list_for_each_safe(pos, n, &ext4_li_info->li_request_list) { 2934bfff6873SLukas Czerner elr = list_entry(pos, struct ext4_li_request, 2935bfff6873SLukas Czerner lr_request); 2936bfff6873SLukas Czerner ext4_remove_li_request(elr); 2937bfff6873SLukas Czerner } 2938bfff6873SLukas Czerner mutex_unlock(&ext4_li_info->li_list_mtx); 2939bfff6873SLukas Czerner } 2940bfff6873SLukas Czerner 2941bfff6873SLukas Czerner static int ext4_run_lazyinit_thread(void) 2942bfff6873SLukas Czerner { 29438f1f7453SEric Sandeen ext4_lazyinit_task = kthread_run(ext4_lazyinit_thread, 29448f1f7453SEric Sandeen ext4_li_info, "ext4lazyinit"); 29458f1f7453SEric Sandeen if (IS_ERR(ext4_lazyinit_task)) { 29468f1f7453SEric Sandeen int err = PTR_ERR(ext4_lazyinit_task); 2947bfff6873SLukas Czerner ext4_clear_request_list(); 2948bfff6873SLukas Czerner kfree(ext4_li_info); 2949bfff6873SLukas Czerner ext4_li_info = NULL; 2950bfff6873SLukas Czerner printk(KERN_CRIT "EXT4: error %d creating inode table " 2951bfff6873SLukas Czerner "initialization thread\n", 2952bfff6873SLukas Czerner err); 2953bfff6873SLukas Czerner return err; 2954bfff6873SLukas Czerner } 2955bfff6873SLukas Czerner ext4_li_info->li_state |= EXT4_LAZYINIT_RUNNING; 2956bfff6873SLukas Czerner return 0; 2957bfff6873SLukas Czerner } 2958bfff6873SLukas Czerner 2959bfff6873SLukas Czerner /* 2960bfff6873SLukas Czerner * Check whether it make sense to run itable init. thread or not. 2961bfff6873SLukas Czerner * If there is at least one uninitialized inode table, return 2962bfff6873SLukas Czerner * corresponding group number, else the loop goes through all 2963bfff6873SLukas Czerner * groups and return total number of groups. 2964bfff6873SLukas Czerner */ 2965bfff6873SLukas Czerner static ext4_group_t ext4_has_uninit_itable(struct super_block *sb) 2966bfff6873SLukas Czerner { 2967bfff6873SLukas Czerner ext4_group_t group, ngroups = EXT4_SB(sb)->s_groups_count; 2968bfff6873SLukas Czerner struct ext4_group_desc *gdp = NULL; 2969bfff6873SLukas Czerner 2970bfff6873SLukas Czerner for (group = 0; group < ngroups; group++) { 2971bfff6873SLukas Czerner gdp = ext4_get_group_desc(sb, group, NULL); 2972bfff6873SLukas Czerner if (!gdp) 2973bfff6873SLukas Czerner continue; 2974bfff6873SLukas Czerner 2975bfff6873SLukas Czerner if (!(gdp->bg_flags & cpu_to_le16(EXT4_BG_INODE_ZEROED))) 2976bfff6873SLukas Czerner break; 2977bfff6873SLukas Czerner } 2978bfff6873SLukas Czerner 2979bfff6873SLukas Czerner return group; 2980bfff6873SLukas Czerner } 2981bfff6873SLukas Czerner 2982bfff6873SLukas Czerner static int ext4_li_info_new(void) 2983bfff6873SLukas Czerner { 2984bfff6873SLukas Czerner struct ext4_lazy_init *eli = NULL; 2985bfff6873SLukas Czerner 2986bfff6873SLukas Czerner eli = kzalloc(sizeof(*eli), GFP_KERNEL); 2987bfff6873SLukas Czerner if (!eli) 2988bfff6873SLukas Czerner return -ENOMEM; 2989bfff6873SLukas Czerner 2990bfff6873SLukas Czerner INIT_LIST_HEAD(&eli->li_request_list); 2991bfff6873SLukas Czerner mutex_init(&eli->li_list_mtx); 2992bfff6873SLukas Czerner 2993bfff6873SLukas Czerner eli->li_state |= EXT4_LAZYINIT_QUIT; 2994bfff6873SLukas Czerner 2995bfff6873SLukas Czerner ext4_li_info = eli; 2996bfff6873SLukas Czerner 2997bfff6873SLukas Czerner return 0; 2998bfff6873SLukas Czerner } 2999bfff6873SLukas Czerner 3000bfff6873SLukas Czerner static struct ext4_li_request *ext4_li_request_new(struct super_block *sb, 3001bfff6873SLukas Czerner ext4_group_t start) 3002bfff6873SLukas Czerner { 3003bfff6873SLukas Czerner struct ext4_sb_info *sbi = EXT4_SB(sb); 3004bfff6873SLukas Czerner struct ext4_li_request *elr; 3005bfff6873SLukas Czerner unsigned long rnd; 3006bfff6873SLukas Czerner 3007bfff6873SLukas Czerner elr = kzalloc(sizeof(*elr), GFP_KERNEL); 3008bfff6873SLukas Czerner if (!elr) 3009bfff6873SLukas Czerner return NULL; 3010bfff6873SLukas Czerner 3011bfff6873SLukas Czerner elr->lr_super = sb; 3012bfff6873SLukas Czerner elr->lr_sbi = sbi; 3013bfff6873SLukas Czerner elr->lr_next_group = start; 3014bfff6873SLukas Czerner 3015bfff6873SLukas Czerner /* 3016bfff6873SLukas Czerner * Randomize first schedule time of the request to 3017bfff6873SLukas Czerner * spread the inode table initialization requests 3018bfff6873SLukas Czerner * better. 3019bfff6873SLukas Czerner */ 3020bfff6873SLukas Czerner get_random_bytes(&rnd, sizeof(rnd)); 3021bfff6873SLukas Czerner elr->lr_next_sched = jiffies + (unsigned long)rnd % 3022bfff6873SLukas Czerner (EXT4_DEF_LI_MAX_START_DELAY * HZ); 3023bfff6873SLukas Czerner 3024bfff6873SLukas Czerner return elr; 3025bfff6873SLukas Czerner } 3026bfff6873SLukas Czerner 3027bfff6873SLukas Czerner static int ext4_register_li_request(struct super_block *sb, 3028bfff6873SLukas Czerner ext4_group_t first_not_zeroed) 3029bfff6873SLukas Czerner { 3030bfff6873SLukas Czerner struct ext4_sb_info *sbi = EXT4_SB(sb); 3031bfff6873SLukas Czerner struct ext4_li_request *elr; 3032bfff6873SLukas Czerner ext4_group_t ngroups = EXT4_SB(sb)->s_groups_count; 30336c5a6cb9SAndrew Morton int ret = 0; 3034bfff6873SLukas Czerner 303551ce6511SLukas Czerner if (sbi->s_li_request != NULL) { 303651ce6511SLukas Czerner /* 303751ce6511SLukas Czerner * Reset timeout so it can be computed again, because 303851ce6511SLukas Czerner * s_li_wait_mult might have changed. 303951ce6511SLukas Czerner */ 304051ce6511SLukas Czerner sbi->s_li_request->lr_timeout = 0; 3041beed5ecbSNicolas Kaiser return 0; 304251ce6511SLukas Czerner } 3043bfff6873SLukas Czerner 3044bfff6873SLukas Czerner if (first_not_zeroed == ngroups || 3045bfff6873SLukas Czerner (sb->s_flags & MS_RDONLY) || 304655ff3840STao Ma !test_opt(sb, INIT_INODE_TABLE)) 3047beed5ecbSNicolas Kaiser return 0; 3048bfff6873SLukas Czerner 3049bfff6873SLukas Czerner elr = ext4_li_request_new(sb, first_not_zeroed); 3050beed5ecbSNicolas Kaiser if (!elr) 3051beed5ecbSNicolas Kaiser return -ENOMEM; 3052bfff6873SLukas Czerner 3053bfff6873SLukas Czerner mutex_lock(&ext4_li_mtx); 3054bfff6873SLukas Czerner 3055bfff6873SLukas Czerner if (NULL == ext4_li_info) { 3056bfff6873SLukas Czerner ret = ext4_li_info_new(); 3057bfff6873SLukas Czerner if (ret) 3058bfff6873SLukas Czerner goto out; 3059bfff6873SLukas Czerner } 3060bfff6873SLukas Czerner 3061bfff6873SLukas Czerner mutex_lock(&ext4_li_info->li_list_mtx); 3062bfff6873SLukas Czerner list_add(&elr->lr_request, &ext4_li_info->li_request_list); 3063bfff6873SLukas Czerner mutex_unlock(&ext4_li_info->li_list_mtx); 3064bfff6873SLukas Czerner 3065bfff6873SLukas Czerner sbi->s_li_request = elr; 306646e4690bSTao Ma /* 306746e4690bSTao Ma * set elr to NULL here since it has been inserted to 306846e4690bSTao Ma * the request_list and the removal and free of it is 306946e4690bSTao Ma * handled by ext4_clear_request_list from now on. 307046e4690bSTao Ma */ 307146e4690bSTao Ma elr = NULL; 3072bfff6873SLukas Czerner 3073bfff6873SLukas Czerner if (!(ext4_li_info->li_state & EXT4_LAZYINIT_RUNNING)) { 3074bfff6873SLukas Czerner ret = ext4_run_lazyinit_thread(); 3075bfff6873SLukas Czerner if (ret) 3076bfff6873SLukas Czerner goto out; 3077bfff6873SLukas Czerner } 3078bfff6873SLukas Czerner out: 3079bfff6873SLukas Czerner mutex_unlock(&ext4_li_mtx); 3080beed5ecbSNicolas Kaiser if (ret) 3081bfff6873SLukas Czerner kfree(elr); 3082bfff6873SLukas Czerner return ret; 3083bfff6873SLukas Czerner } 3084bfff6873SLukas Czerner 3085bfff6873SLukas Czerner /* 3086bfff6873SLukas Czerner * We do not need to lock anything since this is called on 3087bfff6873SLukas Czerner * module unload. 3088bfff6873SLukas Czerner */ 3089bfff6873SLukas Czerner static void ext4_destroy_lazyinit_thread(void) 3090bfff6873SLukas Czerner { 3091bfff6873SLukas Czerner /* 3092bfff6873SLukas Czerner * If thread exited earlier 3093bfff6873SLukas Czerner * there's nothing to be done. 3094bfff6873SLukas Czerner */ 30958f1f7453SEric Sandeen if (!ext4_li_info || !ext4_lazyinit_task) 3096bfff6873SLukas Czerner return; 3097bfff6873SLukas Czerner 30988f1f7453SEric Sandeen kthread_stop(ext4_lazyinit_task); 3099bfff6873SLukas Czerner } 3100bfff6873SLukas Czerner 3101617ba13bSMingming Cao static int ext4_fill_super(struct super_block *sb, void *data, int silent) 3102ac27a0ecSDave Kleikamp { 3103d4c402d9SCurt Wohlgemuth char *orig_data = kstrdup(data, GFP_KERNEL); 3104ac27a0ecSDave Kleikamp struct buffer_head *bh; 3105617ba13bSMingming Cao struct ext4_super_block *es = NULL; 3106617ba13bSMingming Cao struct ext4_sb_info *sbi; 3107617ba13bSMingming Cao ext4_fsblk_t block; 3108617ba13bSMingming Cao ext4_fsblk_t sb_block = get_sb_block(&data); 310970bbb3e0SAndrew Morton ext4_fsblk_t logical_sb_block; 3110ac27a0ecSDave Kleikamp unsigned long offset = 0; 3111ac27a0ecSDave Kleikamp unsigned long journal_devnum = 0; 3112ac27a0ecSDave Kleikamp unsigned long def_mount_opts; 3113ac27a0ecSDave Kleikamp struct inode *root; 31149f6200bbSTheodore Ts'o char *cp; 31150390131bSFrank Mayhar const char *descr; 3116dcc7dae3SCyrill Gorcunov int ret = -ENOMEM; 3117281b5995STheodore Ts'o int blocksize, clustersize; 31184ec11028STheodore Ts'o unsigned int db_count; 31194ec11028STheodore Ts'o unsigned int i; 3120281b5995STheodore Ts'o int needs_recovery, has_huge_files, has_bigalloc; 3121bd81d8eeSLaurent Vivier __u64 blocks_count; 3122833f4077SPeter Zijlstra int err; 3123b3881f74STheodore Ts'o unsigned int journal_ioprio = DEFAULT_JOURNAL_IOPRIO; 3124bfff6873SLukas Czerner ext4_group_t first_not_zeroed; 3125ac27a0ecSDave Kleikamp 3126ac27a0ecSDave Kleikamp sbi = kzalloc(sizeof(*sbi), GFP_KERNEL); 3127ac27a0ecSDave Kleikamp if (!sbi) 3128dcc7dae3SCyrill Gorcunov goto out_free_orig; 3129705895b6SPekka Enberg 3130705895b6SPekka Enberg sbi->s_blockgroup_lock = 3131705895b6SPekka Enberg kzalloc(sizeof(struct blockgroup_lock), GFP_KERNEL); 3132705895b6SPekka Enberg if (!sbi->s_blockgroup_lock) { 3133705895b6SPekka Enberg kfree(sbi); 3134dcc7dae3SCyrill Gorcunov goto out_free_orig; 3135705895b6SPekka Enberg } 3136ac27a0ecSDave Kleikamp sb->s_fs_info = sbi; 3137ac27a0ecSDave Kleikamp sbi->s_mount_opt = 0; 3138617ba13bSMingming Cao sbi->s_resuid = EXT4_DEF_RESUID; 3139617ba13bSMingming Cao sbi->s_resgid = EXT4_DEF_RESGID; 3140240799cdSTheodore Ts'o sbi->s_inode_readahead_blks = EXT4_DEF_INODE_READAHEAD_BLKS; 3141d9c9bef1SMiklos Szeredi sbi->s_sb_block = sb_block; 3142f613dfcbSTheodore Ts'o if (sb->s_bdev->bd_part) 3143f613dfcbSTheodore Ts'o sbi->s_sectors_written_start = 3144f613dfcbSTheodore Ts'o part_stat_read(sb->s_bdev->bd_part, sectors[1]); 3145ac27a0ecSDave Kleikamp 31469f6200bbSTheodore Ts'o /* Cleanup superblock name */ 31479f6200bbSTheodore Ts'o for (cp = sb->s_id; (cp = strchr(cp, '/'));) 31489f6200bbSTheodore Ts'o *cp = '!'; 31499f6200bbSTheodore Ts'o 3150dcc7dae3SCyrill Gorcunov ret = -EINVAL; 3151617ba13bSMingming Cao blocksize = sb_min_blocksize(sb, EXT4_MIN_BLOCK_SIZE); 3152ac27a0ecSDave Kleikamp if (!blocksize) { 3153b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "unable to set blocksize"); 3154ac27a0ecSDave Kleikamp goto out_fail; 3155ac27a0ecSDave Kleikamp } 3156ac27a0ecSDave Kleikamp 3157ac27a0ecSDave Kleikamp /* 3158617ba13bSMingming Cao * The ext4 superblock will not be buffer aligned for other than 1kB 3159ac27a0ecSDave Kleikamp * block sizes. We need to calculate the offset from buffer start. 3160ac27a0ecSDave Kleikamp */ 3161617ba13bSMingming Cao if (blocksize != EXT4_MIN_BLOCK_SIZE) { 316270bbb3e0SAndrew Morton logical_sb_block = sb_block * EXT4_MIN_BLOCK_SIZE; 316370bbb3e0SAndrew Morton offset = do_div(logical_sb_block, blocksize); 3164ac27a0ecSDave Kleikamp } else { 316570bbb3e0SAndrew Morton logical_sb_block = sb_block; 3166ac27a0ecSDave Kleikamp } 3167ac27a0ecSDave Kleikamp 316870bbb3e0SAndrew Morton if (!(bh = sb_bread(sb, logical_sb_block))) { 3169b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "unable to read superblock"); 3170ac27a0ecSDave Kleikamp goto out_fail; 3171ac27a0ecSDave Kleikamp } 3172ac27a0ecSDave Kleikamp /* 3173ac27a0ecSDave Kleikamp * Note: s_es must be initialized as soon as possible because 3174617ba13bSMingming Cao * some ext4 macro-instructions depend on its value 3175ac27a0ecSDave Kleikamp */ 3176617ba13bSMingming Cao es = (struct ext4_super_block *) (((char *)bh->b_data) + offset); 3177ac27a0ecSDave Kleikamp sbi->s_es = es; 3178ac27a0ecSDave Kleikamp sb->s_magic = le16_to_cpu(es->s_magic); 3179617ba13bSMingming Cao if (sb->s_magic != EXT4_SUPER_MAGIC) 3180617ba13bSMingming Cao goto cantfind_ext4; 3181afc32f7eSTheodore Ts'o sbi->s_kbytes_written = le64_to_cpu(es->s_kbytes_written); 3182ac27a0ecSDave Kleikamp 3183ac27a0ecSDave Kleikamp /* Set defaults before we parse the mount options */ 3184ac27a0ecSDave Kleikamp def_mount_opts = le32_to_cpu(es->s_default_mount_opts); 3185fd8c37ecSTheodore Ts'o set_opt(sb, INIT_INODE_TABLE); 3186617ba13bSMingming Cao if (def_mount_opts & EXT4_DEFM_DEBUG) 3187fd8c37ecSTheodore Ts'o set_opt(sb, DEBUG); 3188437ca0fdSDmitry Monakhov if (def_mount_opts & EXT4_DEFM_BSDGROUPS) { 3189437ca0fdSDmitry Monakhov ext4_msg(sb, KERN_WARNING, deprecated_msg, "bsdgroups", 3190437ca0fdSDmitry Monakhov "2.6.38"); 3191fd8c37ecSTheodore Ts'o set_opt(sb, GRPID); 3192437ca0fdSDmitry Monakhov } 3193617ba13bSMingming Cao if (def_mount_opts & EXT4_DEFM_UID16) 3194fd8c37ecSTheodore Ts'o set_opt(sb, NO_UID32); 3195ea663336SEric Sandeen /* xattr user namespace & acls are now defaulted on */ 319603010a33STheodore Ts'o #ifdef CONFIG_EXT4_FS_XATTR 3197fd8c37ecSTheodore Ts'o set_opt(sb, XATTR_USER); 31982e7842b8SHugh Dickins #endif 319903010a33STheodore Ts'o #ifdef CONFIG_EXT4_FS_POSIX_ACL 3200fd8c37ecSTheodore Ts'o set_opt(sb, POSIX_ACL); 32012e7842b8SHugh Dickins #endif 32026fd7a467STheodore Ts'o set_opt(sb, MBLK_IO_SUBMIT); 3203617ba13bSMingming Cao if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_DATA) 3204fd8c37ecSTheodore Ts'o set_opt(sb, JOURNAL_DATA); 3205617ba13bSMingming Cao else if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_ORDERED) 3206fd8c37ecSTheodore Ts'o set_opt(sb, ORDERED_DATA); 3207617ba13bSMingming Cao else if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_WBACK) 3208fd8c37ecSTheodore Ts'o set_opt(sb, WRITEBACK_DATA); 3209ac27a0ecSDave Kleikamp 3210617ba13bSMingming Cao if (le16_to_cpu(sbi->s_es->s_errors) == EXT4_ERRORS_PANIC) 3211fd8c37ecSTheodore Ts'o set_opt(sb, ERRORS_PANIC); 3212bb4f397aSAneesh Kumar K.V else if (le16_to_cpu(sbi->s_es->s_errors) == EXT4_ERRORS_CONTINUE) 3213fd8c37ecSTheodore Ts'o set_opt(sb, ERRORS_CONT); 3214bb4f397aSAneesh Kumar K.V else 3215fd8c37ecSTheodore Ts'o set_opt(sb, ERRORS_RO); 32168b67f04aSTheodore Ts'o if (def_mount_opts & EXT4_DEFM_BLOCK_VALIDITY) 3217fd8c37ecSTheodore Ts'o set_opt(sb, BLOCK_VALIDITY); 32188b67f04aSTheodore Ts'o if (def_mount_opts & EXT4_DEFM_DISCARD) 3219fd8c37ecSTheodore Ts'o set_opt(sb, DISCARD); 3220ac27a0ecSDave Kleikamp 3221ac27a0ecSDave Kleikamp sbi->s_resuid = le16_to_cpu(es->s_def_resuid); 3222ac27a0ecSDave Kleikamp sbi->s_resgid = le16_to_cpu(es->s_def_resgid); 322330773840STheodore Ts'o sbi->s_commit_interval = JBD2_DEFAULT_MAX_COMMIT_AGE * HZ; 322430773840STheodore Ts'o sbi->s_min_batch_time = EXT4_DEF_MIN_BATCH_TIME; 322530773840STheodore Ts'o sbi->s_max_batch_time = EXT4_DEF_MAX_BATCH_TIME; 3226ac27a0ecSDave Kleikamp 32278b67f04aSTheodore Ts'o if ((def_mount_opts & EXT4_DEFM_NOBARRIER) == 0) 3228fd8c37ecSTheodore Ts'o set_opt(sb, BARRIER); 3229ac27a0ecSDave Kleikamp 32301e2462f9SMingming Cao /* 3231dd919b98SAneesh Kumar K.V * enable delayed allocation by default 3232dd919b98SAneesh Kumar K.V * Use -o nodelalloc to turn it off 3233dd919b98SAneesh Kumar K.V */ 32348b67f04aSTheodore Ts'o if (!IS_EXT3_SB(sb) && 32358b67f04aSTheodore Ts'o ((def_mount_opts & EXT4_DEFM_NODELALLOC) == 0)) 3236fd8c37ecSTheodore Ts'o set_opt(sb, DELALLOC); 3237dd919b98SAneesh Kumar K.V 323851ce6511SLukas Czerner /* 323951ce6511SLukas Czerner * set default s_li_wait_mult for lazyinit, for the case there is 324051ce6511SLukas Czerner * no mount option specified. 324151ce6511SLukas Czerner */ 324251ce6511SLukas Czerner sbi->s_li_wait_mult = EXT4_DEF_LI_WAIT_MULT; 324351ce6511SLukas Czerner 32448b67f04aSTheodore Ts'o if (!parse_options((char *) sbi->s_es->s_mount_opts, sb, 32458b67f04aSTheodore Ts'o &journal_devnum, &journal_ioprio, NULL, 0)) { 32468b67f04aSTheodore Ts'o ext4_msg(sb, KERN_WARNING, 32478b67f04aSTheodore Ts'o "failed to parse options in superblock: %s", 32488b67f04aSTheodore Ts'o sbi->s_es->s_mount_opts); 32498b67f04aSTheodore Ts'o } 3250b3881f74STheodore Ts'o if (!parse_options((char *) data, sb, &journal_devnum, 3251b3881f74STheodore Ts'o &journal_ioprio, NULL, 0)) 3252ac27a0ecSDave Kleikamp goto failed_mount; 3253ac27a0ecSDave Kleikamp 325456889787STheodore Ts'o if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) { 325556889787STheodore Ts'o printk_once(KERN_WARNING "EXT4-fs: Warning: mounting " 325656889787STheodore Ts'o "with data=journal disables delayed " 325756889787STheodore Ts'o "allocation and O_DIRECT support!\n"); 325856889787STheodore Ts'o if (test_opt2(sb, EXPLICIT_DELALLOC)) { 325956889787STheodore Ts'o ext4_msg(sb, KERN_ERR, "can't mount with " 326056889787STheodore Ts'o "both data=journal and delalloc"); 326156889787STheodore Ts'o goto failed_mount; 326256889787STheodore Ts'o } 326356889787STheodore Ts'o if (test_opt(sb, DIOREAD_NOLOCK)) { 326456889787STheodore Ts'o ext4_msg(sb, KERN_ERR, "can't mount with " 326556889787STheodore Ts'o "both data=journal and delalloc"); 326656889787STheodore Ts'o goto failed_mount; 326756889787STheodore Ts'o } 326856889787STheodore Ts'o if (test_opt(sb, DELALLOC)) 326956889787STheodore Ts'o clear_opt(sb, DELALLOC); 327056889787STheodore Ts'o } 327156889787STheodore Ts'o 327256889787STheodore Ts'o blocksize = BLOCK_SIZE << le32_to_cpu(es->s_log_block_size); 327356889787STheodore Ts'o if (test_opt(sb, DIOREAD_NOLOCK)) { 327456889787STheodore Ts'o if (blocksize < PAGE_SIZE) { 327556889787STheodore Ts'o ext4_msg(sb, KERN_ERR, "can't mount with " 327656889787STheodore Ts'o "dioread_nolock if block size != PAGE_SIZE"); 327756889787STheodore Ts'o goto failed_mount; 327856889787STheodore Ts'o } 327956889787STheodore Ts'o } 328056889787STheodore Ts'o 3281ac27a0ecSDave Kleikamp sb->s_flags = (sb->s_flags & ~MS_POSIXACL) | 3282482a7425SDmitry Monakhov (test_opt(sb, POSIX_ACL) ? MS_POSIXACL : 0); 3283ac27a0ecSDave Kleikamp 3284617ba13bSMingming Cao if (le32_to_cpu(es->s_rev_level) == EXT4_GOOD_OLD_REV && 3285617ba13bSMingming Cao (EXT4_HAS_COMPAT_FEATURE(sb, ~0U) || 3286617ba13bSMingming Cao EXT4_HAS_RO_COMPAT_FEATURE(sb, ~0U) || 3287617ba13bSMingming Cao EXT4_HAS_INCOMPAT_FEATURE(sb, ~0U))) 3288b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 3289b31e1552SEric Sandeen "feature flags set on rev 0 fs, " 3290b31e1552SEric Sandeen "running e2fsck is recommended"); 3291469108ffSTheodore Tso 32922035e776STheodore Ts'o if (IS_EXT2_SB(sb)) { 32932035e776STheodore Ts'o if (ext2_feature_set_ok(sb)) 32942035e776STheodore Ts'o ext4_msg(sb, KERN_INFO, "mounting ext2 file system " 32952035e776STheodore Ts'o "using the ext4 subsystem"); 32962035e776STheodore Ts'o else { 32972035e776STheodore Ts'o ext4_msg(sb, KERN_ERR, "couldn't mount as ext2 due " 32982035e776STheodore Ts'o "to feature incompatibilities"); 32992035e776STheodore Ts'o goto failed_mount; 33002035e776STheodore Ts'o } 33012035e776STheodore Ts'o } 33022035e776STheodore Ts'o 33032035e776STheodore Ts'o if (IS_EXT3_SB(sb)) { 33042035e776STheodore Ts'o if (ext3_feature_set_ok(sb)) 33052035e776STheodore Ts'o ext4_msg(sb, KERN_INFO, "mounting ext3 file system " 33062035e776STheodore Ts'o "using the ext4 subsystem"); 33072035e776STheodore Ts'o else { 33082035e776STheodore Ts'o ext4_msg(sb, KERN_ERR, "couldn't mount as ext3 due " 33092035e776STheodore Ts'o "to feature incompatibilities"); 33102035e776STheodore Ts'o goto failed_mount; 33112035e776STheodore Ts'o } 33122035e776STheodore Ts'o } 33132035e776STheodore Ts'o 3314469108ffSTheodore Tso /* 3315ac27a0ecSDave Kleikamp * Check feature flags regardless of the revision level, since we 3316ac27a0ecSDave Kleikamp * previously didn't change the revision level when setting the flags, 3317ac27a0ecSDave Kleikamp * so there is a chance incompat flags are set on a rev 0 filesystem. 3318ac27a0ecSDave Kleikamp */ 3319a13fb1a4SEric Sandeen if (!ext4_feature_set_ok(sb, (sb->s_flags & MS_RDONLY))) 3320ac27a0ecSDave Kleikamp goto failed_mount; 3321a13fb1a4SEric Sandeen 3322617ba13bSMingming Cao if (blocksize < EXT4_MIN_BLOCK_SIZE || 3323617ba13bSMingming Cao blocksize > EXT4_MAX_BLOCK_SIZE) { 3324b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3325b31e1552SEric Sandeen "Unsupported filesystem blocksize %d", blocksize); 3326ac27a0ecSDave Kleikamp goto failed_mount; 3327ac27a0ecSDave Kleikamp } 3328ac27a0ecSDave Kleikamp 3329ac27a0ecSDave Kleikamp if (sb->s_blocksize != blocksize) { 3330ce40733cSAneesh Kumar K.V /* Validate the filesystem blocksize */ 3331ce40733cSAneesh Kumar K.V if (!sb_set_blocksize(sb, blocksize)) { 3332b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "bad block size %d", 3333ce40733cSAneesh Kumar K.V blocksize); 3334ac27a0ecSDave Kleikamp goto failed_mount; 3335ac27a0ecSDave Kleikamp } 3336ac27a0ecSDave Kleikamp 3337ac27a0ecSDave Kleikamp brelse(bh); 333870bbb3e0SAndrew Morton logical_sb_block = sb_block * EXT4_MIN_BLOCK_SIZE; 333970bbb3e0SAndrew Morton offset = do_div(logical_sb_block, blocksize); 334070bbb3e0SAndrew Morton bh = sb_bread(sb, logical_sb_block); 3341ac27a0ecSDave Kleikamp if (!bh) { 3342b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3343b31e1552SEric Sandeen "Can't read superblock on 2nd try"); 3344ac27a0ecSDave Kleikamp goto failed_mount; 3345ac27a0ecSDave Kleikamp } 3346617ba13bSMingming Cao es = (struct ext4_super_block *)(((char *)bh->b_data) + offset); 3347ac27a0ecSDave Kleikamp sbi->s_es = es; 3348617ba13bSMingming Cao if (es->s_magic != cpu_to_le16(EXT4_SUPER_MAGIC)) { 3349b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3350b31e1552SEric Sandeen "Magic mismatch, very weird!"); 3351ac27a0ecSDave Kleikamp goto failed_mount; 3352ac27a0ecSDave Kleikamp } 3353ac27a0ecSDave Kleikamp } 3354ac27a0ecSDave Kleikamp 3355a13fb1a4SEric Sandeen has_huge_files = EXT4_HAS_RO_COMPAT_FEATURE(sb, 3356a13fb1a4SEric Sandeen EXT4_FEATURE_RO_COMPAT_HUGE_FILE); 3357f287a1a5STheodore Ts'o sbi->s_bitmap_maxbytes = ext4_max_bitmap_size(sb->s_blocksize_bits, 3358f287a1a5STheodore Ts'o has_huge_files); 3359f287a1a5STheodore Ts'o sb->s_maxbytes = ext4_max_size(sb->s_blocksize_bits, has_huge_files); 3360ac27a0ecSDave Kleikamp 3361617ba13bSMingming Cao if (le32_to_cpu(es->s_rev_level) == EXT4_GOOD_OLD_REV) { 3362617ba13bSMingming Cao sbi->s_inode_size = EXT4_GOOD_OLD_INODE_SIZE; 3363617ba13bSMingming Cao sbi->s_first_ino = EXT4_GOOD_OLD_FIRST_INO; 3364ac27a0ecSDave Kleikamp } else { 3365ac27a0ecSDave Kleikamp sbi->s_inode_size = le16_to_cpu(es->s_inode_size); 3366ac27a0ecSDave Kleikamp sbi->s_first_ino = le32_to_cpu(es->s_first_ino); 3367617ba13bSMingming Cao if ((sbi->s_inode_size < EXT4_GOOD_OLD_INODE_SIZE) || 33681330593eSVignesh Babu (!is_power_of_2(sbi->s_inode_size)) || 3369ac27a0ecSDave Kleikamp (sbi->s_inode_size > blocksize)) { 3370b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3371b31e1552SEric Sandeen "unsupported inode size: %d", 3372ac27a0ecSDave Kleikamp sbi->s_inode_size); 3373ac27a0ecSDave Kleikamp goto failed_mount; 3374ac27a0ecSDave Kleikamp } 3375ef7f3835SKalpak Shah if (sbi->s_inode_size > EXT4_GOOD_OLD_INODE_SIZE) 3376ef7f3835SKalpak Shah sb->s_time_gran = 1 << (EXT4_EPOCH_BITS - 2); 3377ac27a0ecSDave Kleikamp } 33780b8e58a1SAndreas Dilger 33790d1ee42fSAlexandre Ratchov sbi->s_desc_size = le16_to_cpu(es->s_desc_size); 33800d1ee42fSAlexandre Ratchov if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_64BIT)) { 33818fadc143SAlexandre Ratchov if (sbi->s_desc_size < EXT4_MIN_DESC_SIZE_64BIT || 33820d1ee42fSAlexandre Ratchov sbi->s_desc_size > EXT4_MAX_DESC_SIZE || 3383d8ea6cf8Svignesh babu !is_power_of_2(sbi->s_desc_size)) { 3384b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3385b31e1552SEric Sandeen "unsupported descriptor size %lu", 33860d1ee42fSAlexandre Ratchov sbi->s_desc_size); 33870d1ee42fSAlexandre Ratchov goto failed_mount; 33880d1ee42fSAlexandre Ratchov } 33890d1ee42fSAlexandre Ratchov } else 33900d1ee42fSAlexandre Ratchov sbi->s_desc_size = EXT4_MIN_DESC_SIZE; 33910b8e58a1SAndreas Dilger 3392ac27a0ecSDave Kleikamp sbi->s_blocks_per_group = le32_to_cpu(es->s_blocks_per_group); 3393ac27a0ecSDave Kleikamp sbi->s_inodes_per_group = le32_to_cpu(es->s_inodes_per_group); 3394b47b6f38SAndries E. Brouwer if (EXT4_INODE_SIZE(sb) == 0 || EXT4_INODES_PER_GROUP(sb) == 0) 3395617ba13bSMingming Cao goto cantfind_ext4; 33960b8e58a1SAndreas Dilger 3397617ba13bSMingming Cao sbi->s_inodes_per_block = blocksize / EXT4_INODE_SIZE(sb); 3398ac27a0ecSDave Kleikamp if (sbi->s_inodes_per_block == 0) 3399617ba13bSMingming Cao goto cantfind_ext4; 3400ac27a0ecSDave Kleikamp sbi->s_itb_per_group = sbi->s_inodes_per_group / 3401ac27a0ecSDave Kleikamp sbi->s_inodes_per_block; 34020d1ee42fSAlexandre Ratchov sbi->s_desc_per_block = blocksize / EXT4_DESC_SIZE(sb); 3403ac27a0ecSDave Kleikamp sbi->s_sbh = bh; 3404ac27a0ecSDave Kleikamp sbi->s_mount_state = le16_to_cpu(es->s_state); 3405e57aa839SFengguang Wu sbi->s_addr_per_block_bits = ilog2(EXT4_ADDR_PER_BLOCK(sb)); 3406e57aa839SFengguang Wu sbi->s_desc_per_block_bits = ilog2(EXT4_DESC_PER_BLOCK(sb)); 34070b8e58a1SAndreas Dilger 3408ac27a0ecSDave Kleikamp for (i = 0; i < 4; i++) 3409ac27a0ecSDave Kleikamp sbi->s_hash_seed[i] = le32_to_cpu(es->s_hash_seed[i]); 3410ac27a0ecSDave Kleikamp sbi->s_def_hash_version = es->s_def_hash_version; 3411f99b2589STheodore Ts'o i = le32_to_cpu(es->s_flags); 3412f99b2589STheodore Ts'o if (i & EXT2_FLAGS_UNSIGNED_HASH) 3413f99b2589STheodore Ts'o sbi->s_hash_unsigned = 3; 3414f99b2589STheodore Ts'o else if ((i & EXT2_FLAGS_SIGNED_HASH) == 0) { 3415f99b2589STheodore Ts'o #ifdef __CHAR_UNSIGNED__ 3416f99b2589STheodore Ts'o es->s_flags |= cpu_to_le32(EXT2_FLAGS_UNSIGNED_HASH); 3417f99b2589STheodore Ts'o sbi->s_hash_unsigned = 3; 3418f99b2589STheodore Ts'o #else 3419f99b2589STheodore Ts'o es->s_flags |= cpu_to_le32(EXT2_FLAGS_SIGNED_HASH); 3420f99b2589STheodore Ts'o #endif 3421f99b2589STheodore Ts'o sb->s_dirt = 1; 3422f99b2589STheodore Ts'o } 3423ac27a0ecSDave Kleikamp 3424281b5995STheodore Ts'o /* Handle clustersize */ 3425281b5995STheodore Ts'o clustersize = BLOCK_SIZE << le32_to_cpu(es->s_log_cluster_size); 3426281b5995STheodore Ts'o has_bigalloc = EXT4_HAS_RO_COMPAT_FEATURE(sb, 3427281b5995STheodore Ts'o EXT4_FEATURE_RO_COMPAT_BIGALLOC); 3428281b5995STheodore Ts'o if (has_bigalloc) { 3429281b5995STheodore Ts'o if (clustersize < blocksize) { 3430281b5995STheodore Ts'o ext4_msg(sb, KERN_ERR, 3431281b5995STheodore Ts'o "cluster size (%d) smaller than " 3432281b5995STheodore Ts'o "block size (%d)", clustersize, blocksize); 3433281b5995STheodore Ts'o goto failed_mount; 3434281b5995STheodore Ts'o } 3435281b5995STheodore Ts'o sbi->s_cluster_bits = le32_to_cpu(es->s_log_cluster_size) - 3436281b5995STheodore Ts'o le32_to_cpu(es->s_log_block_size); 3437281b5995STheodore Ts'o sbi->s_clusters_per_group = 3438281b5995STheodore Ts'o le32_to_cpu(es->s_clusters_per_group); 3439281b5995STheodore Ts'o if (sbi->s_clusters_per_group > blocksize * 8) { 3440281b5995STheodore Ts'o ext4_msg(sb, KERN_ERR, 3441281b5995STheodore Ts'o "#clusters per group too big: %lu", 3442281b5995STheodore Ts'o sbi->s_clusters_per_group); 3443281b5995STheodore Ts'o goto failed_mount; 3444281b5995STheodore Ts'o } 3445281b5995STheodore Ts'o if (sbi->s_blocks_per_group != 3446281b5995STheodore Ts'o (sbi->s_clusters_per_group * (clustersize / blocksize))) { 3447281b5995STheodore Ts'o ext4_msg(sb, KERN_ERR, "blocks per group (%lu) and " 3448281b5995STheodore Ts'o "clusters per group (%lu) inconsistent", 3449281b5995STheodore Ts'o sbi->s_blocks_per_group, 3450281b5995STheodore Ts'o sbi->s_clusters_per_group); 3451281b5995STheodore Ts'o goto failed_mount; 3452281b5995STheodore Ts'o } 3453281b5995STheodore Ts'o } else { 3454281b5995STheodore Ts'o if (clustersize != blocksize) { 3455281b5995STheodore Ts'o ext4_warning(sb, "fragment/cluster size (%d) != " 3456281b5995STheodore Ts'o "block size (%d)", clustersize, 3457281b5995STheodore Ts'o blocksize); 3458281b5995STheodore Ts'o clustersize = blocksize; 3459281b5995STheodore Ts'o } 3460ac27a0ecSDave Kleikamp if (sbi->s_blocks_per_group > blocksize * 8) { 3461b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3462b31e1552SEric Sandeen "#blocks per group too big: %lu", 3463ac27a0ecSDave Kleikamp sbi->s_blocks_per_group); 3464ac27a0ecSDave Kleikamp goto failed_mount; 3465ac27a0ecSDave Kleikamp } 3466281b5995STheodore Ts'o sbi->s_clusters_per_group = sbi->s_blocks_per_group; 3467281b5995STheodore Ts'o sbi->s_cluster_bits = 0; 3468281b5995STheodore Ts'o } 3469281b5995STheodore Ts'o sbi->s_cluster_ratio = clustersize / blocksize; 3470281b5995STheodore Ts'o 3471ac27a0ecSDave Kleikamp if (sbi->s_inodes_per_group > blocksize * 8) { 3472b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3473b31e1552SEric Sandeen "#inodes per group too big: %lu", 3474ac27a0ecSDave Kleikamp sbi->s_inodes_per_group); 3475ac27a0ecSDave Kleikamp goto failed_mount; 3476ac27a0ecSDave Kleikamp } 3477ac27a0ecSDave Kleikamp 3478bf43d84bSEric Sandeen /* 3479bf43d84bSEric Sandeen * Test whether we have more sectors than will fit in sector_t, 3480bf43d84bSEric Sandeen * and whether the max offset is addressable by the page cache. 3481bf43d84bSEric Sandeen */ 34825a9ae68aSDarrick J. Wong err = generic_check_addressable(sb->s_blocksize_bits, 348330ca22c7SPatrick J. LoPresti ext4_blocks_count(es)); 34845a9ae68aSDarrick J. Wong if (err) { 3485b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "filesystem" 3486bf43d84bSEric Sandeen " too large to mount safely on this system"); 3487ac27a0ecSDave Kleikamp if (sizeof(sector_t) < 8) 348890c699a9SBartlomiej Zolnierkiewicz ext4_msg(sb, KERN_WARNING, "CONFIG_LBDAF not enabled"); 34895a9ae68aSDarrick J. Wong ret = err; 3490ac27a0ecSDave Kleikamp goto failed_mount; 3491ac27a0ecSDave Kleikamp } 3492ac27a0ecSDave Kleikamp 3493617ba13bSMingming Cao if (EXT4_BLOCKS_PER_GROUP(sb) == 0) 3494617ba13bSMingming Cao goto cantfind_ext4; 3495e7c95593SEric Sandeen 34960f2ddca6SFrom: Thiemo Nagel /* check blocks count against device size */ 34970f2ddca6SFrom: Thiemo Nagel blocks_count = sb->s_bdev->bd_inode->i_size >> sb->s_blocksize_bits; 34980f2ddca6SFrom: Thiemo Nagel if (blocks_count && ext4_blocks_count(es) > blocks_count) { 3499b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "bad geometry: block count %llu " 3500b31e1552SEric Sandeen "exceeds size of device (%llu blocks)", 35010f2ddca6SFrom: Thiemo Nagel ext4_blocks_count(es), blocks_count); 35020f2ddca6SFrom: Thiemo Nagel goto failed_mount; 35030f2ddca6SFrom: Thiemo Nagel } 35040f2ddca6SFrom: Thiemo Nagel 35054ec11028STheodore Ts'o /* 35064ec11028STheodore Ts'o * It makes no sense for the first data block to be beyond the end 35074ec11028STheodore Ts'o * of the filesystem. 35084ec11028STheodore Ts'o */ 35094ec11028STheodore Ts'o if (le32_to_cpu(es->s_first_data_block) >= ext4_blocks_count(es)) { 3510b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "bad geometry: first data" 3511b31e1552SEric Sandeen "block %u is beyond end of filesystem (%llu)", 3512e7c95593SEric Sandeen le32_to_cpu(es->s_first_data_block), 35134ec11028STheodore Ts'o ext4_blocks_count(es)); 3514e7c95593SEric Sandeen goto failed_mount; 3515e7c95593SEric Sandeen } 3516bd81d8eeSLaurent Vivier blocks_count = (ext4_blocks_count(es) - 3517bd81d8eeSLaurent Vivier le32_to_cpu(es->s_first_data_block) + 3518bd81d8eeSLaurent Vivier EXT4_BLOCKS_PER_GROUP(sb) - 1); 3519bd81d8eeSLaurent Vivier do_div(blocks_count, EXT4_BLOCKS_PER_GROUP(sb)); 35204ec11028STheodore Ts'o if (blocks_count > ((uint64_t)1<<32) - EXT4_DESC_PER_BLOCK(sb)) { 3521b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "groups count too large: %u " 35224ec11028STheodore Ts'o "(block count %llu, first data block %u, " 3523b31e1552SEric Sandeen "blocks per group %lu)", sbi->s_groups_count, 35244ec11028STheodore Ts'o ext4_blocks_count(es), 35254ec11028STheodore Ts'o le32_to_cpu(es->s_first_data_block), 35264ec11028STheodore Ts'o EXT4_BLOCKS_PER_GROUP(sb)); 35274ec11028STheodore Ts'o goto failed_mount; 35284ec11028STheodore Ts'o } 3529bd81d8eeSLaurent Vivier sbi->s_groups_count = blocks_count; 3530fb0a387dSEric Sandeen sbi->s_blockfile_groups = min_t(ext4_group_t, sbi->s_groups_count, 3531fb0a387dSEric Sandeen (EXT4_MAX_BLOCK_FILE_PHYS / EXT4_BLOCKS_PER_GROUP(sb))); 3532617ba13bSMingming Cao db_count = (sbi->s_groups_count + EXT4_DESC_PER_BLOCK(sb) - 1) / 3533617ba13bSMingming Cao EXT4_DESC_PER_BLOCK(sb); 3534f18a5f21STheodore Ts'o sbi->s_group_desc = ext4_kvmalloc(db_count * 3535f18a5f21STheodore Ts'o sizeof(struct buffer_head *), 3536ac27a0ecSDave Kleikamp GFP_KERNEL); 3537ac27a0ecSDave Kleikamp if (sbi->s_group_desc == NULL) { 3538b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "not enough memory"); 3539ac27a0ecSDave Kleikamp goto failed_mount; 3540ac27a0ecSDave Kleikamp } 3541ac27a0ecSDave Kleikamp 35429f6200bbSTheodore Ts'o if (ext4_proc_root) 35439f6200bbSTheodore Ts'o sbi->s_proc = proc_mkdir(sb->s_id, ext4_proc_root); 3544240799cdSTheodore Ts'o 3545705895b6SPekka Enberg bgl_lock_init(sbi->s_blockgroup_lock); 3546ac27a0ecSDave Kleikamp 3547ac27a0ecSDave Kleikamp for (i = 0; i < db_count; i++) { 354870bbb3e0SAndrew Morton block = descriptor_loc(sb, logical_sb_block, i); 3549ac27a0ecSDave Kleikamp sbi->s_group_desc[i] = sb_bread(sb, block); 3550ac27a0ecSDave Kleikamp if (!sbi->s_group_desc[i]) { 3551b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3552b31e1552SEric Sandeen "can't read group descriptor %d", i); 3553ac27a0ecSDave Kleikamp db_count = i; 3554ac27a0ecSDave Kleikamp goto failed_mount2; 3555ac27a0ecSDave Kleikamp } 3556ac27a0ecSDave Kleikamp } 3557bfff6873SLukas Czerner if (!ext4_check_descriptors(sb, &first_not_zeroed)) { 3558b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "group descriptors corrupted!"); 3559ac27a0ecSDave Kleikamp goto failed_mount2; 3560ac27a0ecSDave Kleikamp } 3561772cb7c8SJose R. Santos if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_FLEX_BG)) 3562772cb7c8SJose R. Santos if (!ext4_fill_flex_info(sb)) { 3563b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3564b31e1552SEric Sandeen "unable to initialize " 3565b31e1552SEric Sandeen "flex_bg meta info!"); 3566772cb7c8SJose R. Santos goto failed_mount2; 3567772cb7c8SJose R. Santos } 3568772cb7c8SJose R. Santos 3569ac27a0ecSDave Kleikamp sbi->s_gdb_count = db_count; 3570ac27a0ecSDave Kleikamp get_random_bytes(&sbi->s_next_generation, sizeof(u32)); 3571ac27a0ecSDave Kleikamp spin_lock_init(&sbi->s_next_gen_lock); 3572ac27a0ecSDave Kleikamp 357304496411STao Ma init_timer(&sbi->s_err_report); 357404496411STao Ma sbi->s_err_report.function = print_daily_error_info; 357504496411STao Ma sbi->s_err_report.data = (unsigned long) sb; 357604496411STao Ma 357757042651STheodore Ts'o err = percpu_counter_init(&sbi->s_freeclusters_counter, 35785dee5437STheodore Ts'o ext4_count_free_clusters(sb)); 3579ce7e010aSTheodore Ts'o if (!err) { 3580ce7e010aSTheodore Ts'o err = percpu_counter_init(&sbi->s_freeinodes_counter, 3581ce7e010aSTheodore Ts'o ext4_count_free_inodes(sb)); 3582ce7e010aSTheodore Ts'o } 3583ce7e010aSTheodore Ts'o if (!err) { 3584ce7e010aSTheodore Ts'o err = percpu_counter_init(&sbi->s_dirs_counter, 3585ce7e010aSTheodore Ts'o ext4_count_dirs(sb)); 3586ce7e010aSTheodore Ts'o } 3587ce7e010aSTheodore Ts'o if (!err) { 358857042651STheodore Ts'o err = percpu_counter_init(&sbi->s_dirtyclusters_counter, 0); 3589ce7e010aSTheodore Ts'o } 3590ce7e010aSTheodore Ts'o if (err) { 3591ce7e010aSTheodore Ts'o ext4_msg(sb, KERN_ERR, "insufficient memory"); 3592ce7e010aSTheodore Ts'o goto failed_mount3; 3593ce7e010aSTheodore Ts'o } 3594ce7e010aSTheodore Ts'o 3595c9de560dSAlex Tomas sbi->s_stripe = ext4_get_stripe_size(sbi); 359655138e0bSTheodore Ts'o sbi->s_max_writeback_mb_bump = 128; 3597c9de560dSAlex Tomas 3598ac27a0ecSDave Kleikamp /* 3599ac27a0ecSDave Kleikamp * set up enough so that it can read an inode 3600ac27a0ecSDave Kleikamp */ 36019ca92389STheodore Ts'o if (!test_opt(sb, NOLOAD) && 36029ca92389STheodore Ts'o EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)) 3603617ba13bSMingming Cao sb->s_op = &ext4_sops; 36049ca92389STheodore Ts'o else 36059ca92389STheodore Ts'o sb->s_op = &ext4_nojournal_sops; 3606617ba13bSMingming Cao sb->s_export_op = &ext4_export_ops; 3607617ba13bSMingming Cao sb->s_xattr = ext4_xattr_handlers; 3608ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 3609617ba13bSMingming Cao sb->s_qcop = &ext4_qctl_operations; 3610617ba13bSMingming Cao sb->dq_op = &ext4_quota_operations; 3611ac27a0ecSDave Kleikamp #endif 3612f2fa2ffcSAneesh Kumar K.V memcpy(sb->s_uuid, es->s_uuid, sizeof(es->s_uuid)); 3613f2fa2ffcSAneesh Kumar K.V 3614ac27a0ecSDave Kleikamp INIT_LIST_HEAD(&sbi->s_orphan); /* unlinked but open files */ 36153b9d4ed2STheodore Ts'o mutex_init(&sbi->s_orphan_lock); 36168f82f840SYongqiang Yang sbi->s_resize_flags = 0; 3617ac27a0ecSDave Kleikamp 3618ac27a0ecSDave Kleikamp sb->s_root = NULL; 3619ac27a0ecSDave Kleikamp 3620ac27a0ecSDave Kleikamp needs_recovery = (es->s_last_orphan != 0 || 3621617ba13bSMingming Cao EXT4_HAS_INCOMPAT_FEATURE(sb, 3622617ba13bSMingming Cao EXT4_FEATURE_INCOMPAT_RECOVER)); 3623ac27a0ecSDave Kleikamp 3624c5e06d10SJohann Lombardi if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_MMP) && 3625c5e06d10SJohann Lombardi !(sb->s_flags & MS_RDONLY)) 3626c5e06d10SJohann Lombardi if (ext4_multi_mount_protect(sb, le64_to_cpu(es->s_mmp_block))) 3627c5e06d10SJohann Lombardi goto failed_mount3; 3628c5e06d10SJohann Lombardi 3629ac27a0ecSDave Kleikamp /* 3630ac27a0ecSDave Kleikamp * The first inode we look at is the journal inode. Don't try 3631ac27a0ecSDave Kleikamp * root first: it may be modified in the journal! 3632ac27a0ecSDave Kleikamp */ 3633ac27a0ecSDave Kleikamp if (!test_opt(sb, NOLOAD) && 3634617ba13bSMingming Cao EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)) { 3635617ba13bSMingming Cao if (ext4_load_journal(sb, es, journal_devnum)) 3636ac27a0ecSDave Kleikamp goto failed_mount3; 36370390131bSFrank Mayhar } else if (test_opt(sb, NOLOAD) && !(sb->s_flags & MS_RDONLY) && 36380390131bSFrank Mayhar EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER)) { 3639b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "required journal recovery " 3640b31e1552SEric Sandeen "suppressed and not mounted read-only"); 3641744692dcSJiaying Zhang goto failed_mount_wq; 3642ac27a0ecSDave Kleikamp } else { 3643fd8c37ecSTheodore Ts'o clear_opt(sb, DATA_FLAGS); 36440390131bSFrank Mayhar sbi->s_journal = NULL; 36450390131bSFrank Mayhar needs_recovery = 0; 36460390131bSFrank Mayhar goto no_journal; 3647ac27a0ecSDave Kleikamp } 3648ac27a0ecSDave Kleikamp 3649eb40a09cSJose R. Santos if (ext4_blocks_count(es) > 0xffffffffULL && 3650eb40a09cSJose R. Santos !jbd2_journal_set_features(EXT4_SB(sb)->s_journal, 0, 0, 3651eb40a09cSJose R. Santos JBD2_FEATURE_INCOMPAT_64BIT)) { 3652b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "Failed to set 64-bit journal feature"); 3653744692dcSJiaying Zhang goto failed_mount_wq; 3654eb40a09cSJose R. Santos } 3655eb40a09cSJose R. Santos 3656d4da6c9cSLinus Torvalds if (test_opt(sb, JOURNAL_ASYNC_COMMIT)) { 3657d4da6c9cSLinus Torvalds jbd2_journal_set_features(sbi->s_journal, 3658d4da6c9cSLinus Torvalds JBD2_FEATURE_COMPAT_CHECKSUM, 0, 3659d4da6c9cSLinus Torvalds JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT); 3660d4da6c9cSLinus Torvalds } else if (test_opt(sb, JOURNAL_CHECKSUM)) { 3661818d276cSGirish Shilamkar jbd2_journal_set_features(sbi->s_journal, 3662818d276cSGirish Shilamkar JBD2_FEATURE_COMPAT_CHECKSUM, 0, 0); 3663818d276cSGirish Shilamkar jbd2_journal_clear_features(sbi->s_journal, 0, 0, 3664818d276cSGirish Shilamkar JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT); 3665d4da6c9cSLinus Torvalds } else { 3666d4da6c9cSLinus Torvalds jbd2_journal_clear_features(sbi->s_journal, 3667d4da6c9cSLinus Torvalds JBD2_FEATURE_COMPAT_CHECKSUM, 0, 3668d4da6c9cSLinus Torvalds JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT); 3669d4da6c9cSLinus Torvalds } 3670818d276cSGirish Shilamkar 3671ac27a0ecSDave Kleikamp /* We have now updated the journal if required, so we can 3672ac27a0ecSDave Kleikamp * validate the data journaling mode. */ 3673ac27a0ecSDave Kleikamp switch (test_opt(sb, DATA_FLAGS)) { 3674ac27a0ecSDave Kleikamp case 0: 3675ac27a0ecSDave Kleikamp /* No mode set, assume a default based on the journal 367663f57933SAndrew Morton * capabilities: ORDERED_DATA if the journal can 367763f57933SAndrew Morton * cope, else JOURNAL_DATA 367863f57933SAndrew Morton */ 3679dab291afSMingming Cao if (jbd2_journal_check_available_features 3680dab291afSMingming Cao (sbi->s_journal, 0, 0, JBD2_FEATURE_INCOMPAT_REVOKE)) 3681fd8c37ecSTheodore Ts'o set_opt(sb, ORDERED_DATA); 3682ac27a0ecSDave Kleikamp else 3683fd8c37ecSTheodore Ts'o set_opt(sb, JOURNAL_DATA); 3684ac27a0ecSDave Kleikamp break; 3685ac27a0ecSDave Kleikamp 3686617ba13bSMingming Cao case EXT4_MOUNT_ORDERED_DATA: 3687617ba13bSMingming Cao case EXT4_MOUNT_WRITEBACK_DATA: 3688dab291afSMingming Cao if (!jbd2_journal_check_available_features 3689dab291afSMingming Cao (sbi->s_journal, 0, 0, JBD2_FEATURE_INCOMPAT_REVOKE)) { 3690b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "Journal does not support " 3691b31e1552SEric Sandeen "requested data journaling mode"); 3692744692dcSJiaying Zhang goto failed_mount_wq; 3693ac27a0ecSDave Kleikamp } 3694ac27a0ecSDave Kleikamp default: 3695ac27a0ecSDave Kleikamp break; 3696ac27a0ecSDave Kleikamp } 3697b3881f74STheodore Ts'o set_task_ioprio(sbi->s_journal->j_task, journal_ioprio); 3698ac27a0ecSDave Kleikamp 3699ce7e010aSTheodore Ts'o /* 3700ce7e010aSTheodore Ts'o * The journal may have updated the bg summary counts, so we 3701ce7e010aSTheodore Ts'o * need to update the global counters. 3702ce7e010aSTheodore Ts'o */ 370357042651STheodore Ts'o percpu_counter_set(&sbi->s_freeclusters_counter, 37045dee5437STheodore Ts'o ext4_count_free_clusters(sb)); 3705ce7e010aSTheodore Ts'o percpu_counter_set(&sbi->s_freeinodes_counter, 370684061e07SDmitry Monakhov ext4_count_free_inodes(sb)); 3707ce7e010aSTheodore Ts'o percpu_counter_set(&sbi->s_dirs_counter, 370884061e07SDmitry Monakhov ext4_count_dirs(sb)); 370957042651STheodore Ts'o percpu_counter_set(&sbi->s_dirtyclusters_counter, 0); 3710206f7ab4SChristoph Hellwig 3711ce7e010aSTheodore Ts'o no_journal: 3712fd89d5f2STejun Heo /* 3713fd89d5f2STejun Heo * The maximum number of concurrent works can be high and 3714fd89d5f2STejun Heo * concurrency isn't really necessary. Limit it to 1. 3715fd89d5f2STejun Heo */ 3716fd89d5f2STejun Heo EXT4_SB(sb)->dio_unwritten_wq = 3717ae005cbeSLinus Torvalds alloc_workqueue("ext4-dio-unwritten", WQ_MEM_RECLAIM | WQ_UNBOUND, 1); 37184c0425ffSMingming Cao if (!EXT4_SB(sb)->dio_unwritten_wq) { 37194c0425ffSMingming Cao printk(KERN_ERR "EXT4-fs: failed to create DIO workqueue\n"); 37204c0425ffSMingming Cao goto failed_mount_wq; 37214c0425ffSMingming Cao } 37224c0425ffSMingming Cao 3723ac27a0ecSDave Kleikamp /* 3724dab291afSMingming Cao * The jbd2_journal_load will have done any necessary log recovery, 3725ac27a0ecSDave Kleikamp * so we can safely mount the rest of the filesystem now. 3726ac27a0ecSDave Kleikamp */ 3727ac27a0ecSDave Kleikamp 37281d1fe1eeSDavid Howells root = ext4_iget(sb, EXT4_ROOT_INO); 37291d1fe1eeSDavid Howells if (IS_ERR(root)) { 3730b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "get root inode failed"); 37311d1fe1eeSDavid Howells ret = PTR_ERR(root); 373232a9bb57SManish Katiyar root = NULL; 3733ac27a0ecSDave Kleikamp goto failed_mount4; 3734ac27a0ecSDave Kleikamp } 3735ac27a0ecSDave Kleikamp if (!S_ISDIR(root->i_mode) || !root->i_blocks || !root->i_size) { 3736b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "corrupt root inode, run e2fsck"); 3737ac27a0ecSDave Kleikamp goto failed_mount4; 3738ac27a0ecSDave Kleikamp } 37391d1fe1eeSDavid Howells sb->s_root = d_alloc_root(root); 37401d1fe1eeSDavid Howells if (!sb->s_root) { 3741b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "get root dentry failed"); 37421d1fe1eeSDavid Howells ret = -ENOMEM; 37431d1fe1eeSDavid Howells goto failed_mount4; 37441d1fe1eeSDavid Howells } 3745ac27a0ecSDave Kleikamp 3746617ba13bSMingming Cao ext4_setup_super(sb, es, sb->s_flags & MS_RDONLY); 3747ef7f3835SKalpak Shah 3748ef7f3835SKalpak Shah /* determine the minimum size of new large inodes, if present */ 3749ef7f3835SKalpak Shah if (sbi->s_inode_size > EXT4_GOOD_OLD_INODE_SIZE) { 3750ef7f3835SKalpak Shah sbi->s_want_extra_isize = sizeof(struct ext4_inode) - 3751ef7f3835SKalpak Shah EXT4_GOOD_OLD_INODE_SIZE; 3752ef7f3835SKalpak Shah if (EXT4_HAS_RO_COMPAT_FEATURE(sb, 3753ef7f3835SKalpak Shah EXT4_FEATURE_RO_COMPAT_EXTRA_ISIZE)) { 3754ef7f3835SKalpak Shah if (sbi->s_want_extra_isize < 3755ef7f3835SKalpak Shah le16_to_cpu(es->s_want_extra_isize)) 3756ef7f3835SKalpak Shah sbi->s_want_extra_isize = 3757ef7f3835SKalpak Shah le16_to_cpu(es->s_want_extra_isize); 3758ef7f3835SKalpak Shah if (sbi->s_want_extra_isize < 3759ef7f3835SKalpak Shah le16_to_cpu(es->s_min_extra_isize)) 3760ef7f3835SKalpak Shah sbi->s_want_extra_isize = 3761ef7f3835SKalpak Shah le16_to_cpu(es->s_min_extra_isize); 3762ef7f3835SKalpak Shah } 3763ef7f3835SKalpak Shah } 3764ef7f3835SKalpak Shah /* Check if enough inode space is available */ 3765ef7f3835SKalpak Shah if (EXT4_GOOD_OLD_INODE_SIZE + sbi->s_want_extra_isize > 3766ef7f3835SKalpak Shah sbi->s_inode_size) { 3767ef7f3835SKalpak Shah sbi->s_want_extra_isize = sizeof(struct ext4_inode) - 3768ef7f3835SKalpak Shah EXT4_GOOD_OLD_INODE_SIZE; 3769b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "required extra inode space not" 3770b31e1552SEric Sandeen "available"); 3771ef7f3835SKalpak Shah } 3772ef7f3835SKalpak Shah 37736fd058f7STheodore Ts'o err = ext4_setup_system_zone(sb); 37746fd058f7STheodore Ts'o if (err) { 3775b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "failed to initialize system " 3776fbe845ddSCurt Wohlgemuth "zone (%d)", err); 37776fd058f7STheodore Ts'o goto failed_mount4; 37786fd058f7STheodore Ts'o } 37796fd058f7STheodore Ts'o 3780c2774d84SAneesh Kumar K.V ext4_ext_init(sb); 3781c2774d84SAneesh Kumar K.V err = ext4_mb_init(sb, needs_recovery); 3782c2774d84SAneesh Kumar K.V if (err) { 3783421f91d2SUwe Kleine-König ext4_msg(sb, KERN_ERR, "failed to initialize mballoc (%d)", 3784c2774d84SAneesh Kumar K.V err); 3785dcf2d804STao Ma goto failed_mount5; 3786c2774d84SAneesh Kumar K.V } 3787c2774d84SAneesh Kumar K.V 3788bfff6873SLukas Czerner err = ext4_register_li_request(sb, first_not_zeroed); 3789bfff6873SLukas Czerner if (err) 3790dcf2d804STao Ma goto failed_mount6; 3791bfff6873SLukas Czerner 37923197ebdbSTheodore Ts'o sbi->s_kobj.kset = ext4_kset; 37933197ebdbSTheodore Ts'o init_completion(&sbi->s_kobj_unregister); 37943197ebdbSTheodore Ts'o err = kobject_init_and_add(&sbi->s_kobj, &ext4_ktype, NULL, 37953197ebdbSTheodore Ts'o "%s", sb->s_id); 3796dcf2d804STao Ma if (err) 3797dcf2d804STao Ma goto failed_mount7; 37983197ebdbSTheodore Ts'o 3799617ba13bSMingming Cao EXT4_SB(sb)->s_mount_state |= EXT4_ORPHAN_FS; 3800617ba13bSMingming Cao ext4_orphan_cleanup(sb, es); 3801617ba13bSMingming Cao EXT4_SB(sb)->s_mount_state &= ~EXT4_ORPHAN_FS; 38020390131bSFrank Mayhar if (needs_recovery) { 3803b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "recovery complete"); 3804617ba13bSMingming Cao ext4_mark_recovery_complete(sb, es); 38050390131bSFrank Mayhar } 38060390131bSFrank Mayhar if (EXT4_SB(sb)->s_journal) { 38070390131bSFrank Mayhar if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) 38080390131bSFrank Mayhar descr = " journalled data mode"; 38090390131bSFrank Mayhar else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA) 38100390131bSFrank Mayhar descr = " ordered data mode"; 38110390131bSFrank Mayhar else 38120390131bSFrank Mayhar descr = " writeback data mode"; 38130390131bSFrank Mayhar } else 38140390131bSFrank Mayhar descr = "out journal"; 38150390131bSFrank Mayhar 3816d4c402d9SCurt Wohlgemuth ext4_msg(sb, KERN_INFO, "mounted filesystem with%s. " 38178b67f04aSTheodore Ts'o "Opts: %s%s%s", descr, sbi->s_es->s_mount_opts, 38188b67f04aSTheodore Ts'o *sbi->s_es->s_mount_opts ? "; " : "", orig_data); 3819ac27a0ecSDave Kleikamp 382066e61a9eSTheodore Ts'o if (es->s_error_count) 382166e61a9eSTheodore Ts'o mod_timer(&sbi->s_err_report, jiffies + 300*HZ); /* 5 minutes */ 3822ac27a0ecSDave Kleikamp 3823d4c402d9SCurt Wohlgemuth kfree(orig_data); 3824ac27a0ecSDave Kleikamp return 0; 3825ac27a0ecSDave Kleikamp 3826617ba13bSMingming Cao cantfind_ext4: 3827ac27a0ecSDave Kleikamp if (!silent) 3828b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "VFS: Can't find ext4 filesystem"); 3829ac27a0ecSDave Kleikamp goto failed_mount; 3830ac27a0ecSDave Kleikamp 3831dcf2d804STao Ma failed_mount7: 3832dcf2d804STao Ma ext4_unregister_li_request(sb); 3833dcf2d804STao Ma failed_mount6: 3834dcf2d804STao Ma ext4_ext_release(sb); 3835dcf2d804STao Ma failed_mount5: 3836dcf2d804STao Ma ext4_mb_release(sb); 3837dcf2d804STao Ma ext4_release_system_zone(sb); 3838ac27a0ecSDave Kleikamp failed_mount4: 383932a9bb57SManish Katiyar iput(root); 384032a9bb57SManish Katiyar sb->s_root = NULL; 3841b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "mount failed"); 38424c0425ffSMingming Cao destroy_workqueue(EXT4_SB(sb)->dio_unwritten_wq); 38434c0425ffSMingming Cao failed_mount_wq: 38440390131bSFrank Mayhar if (sbi->s_journal) { 3845dab291afSMingming Cao jbd2_journal_destroy(sbi->s_journal); 384647b4a50bSJan Kara sbi->s_journal = NULL; 38470390131bSFrank Mayhar } 3848ac27a0ecSDave Kleikamp failed_mount3: 384904496411STao Ma del_timer(&sbi->s_err_report); 38509933fc0aSTheodore Ts'o if (sbi->s_flex_groups) 38519933fc0aSTheodore Ts'o ext4_kvfree(sbi->s_flex_groups); 385257042651STheodore Ts'o percpu_counter_destroy(&sbi->s_freeclusters_counter); 3853ce7e010aSTheodore Ts'o percpu_counter_destroy(&sbi->s_freeinodes_counter); 3854ce7e010aSTheodore Ts'o percpu_counter_destroy(&sbi->s_dirs_counter); 385557042651STheodore Ts'o percpu_counter_destroy(&sbi->s_dirtyclusters_counter); 3856c5e06d10SJohann Lombardi if (sbi->s_mmp_tsk) 3857c5e06d10SJohann Lombardi kthread_stop(sbi->s_mmp_tsk); 3858ac27a0ecSDave Kleikamp failed_mount2: 3859ac27a0ecSDave Kleikamp for (i = 0; i < db_count; i++) 3860ac27a0ecSDave Kleikamp brelse(sbi->s_group_desc[i]); 3861f18a5f21STheodore Ts'o ext4_kvfree(sbi->s_group_desc); 3862ac27a0ecSDave Kleikamp failed_mount: 3863240799cdSTheodore Ts'o if (sbi->s_proc) { 38649f6200bbSTheodore Ts'o remove_proc_entry(sb->s_id, ext4_proc_root); 3865240799cdSTheodore Ts'o } 3866ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 3867ac27a0ecSDave Kleikamp for (i = 0; i < MAXQUOTAS; i++) 3868ac27a0ecSDave Kleikamp kfree(sbi->s_qf_names[i]); 3869ac27a0ecSDave Kleikamp #endif 3870617ba13bSMingming Cao ext4_blkdev_remove(sbi); 3871ac27a0ecSDave Kleikamp brelse(bh); 3872ac27a0ecSDave Kleikamp out_fail: 3873ac27a0ecSDave Kleikamp sb->s_fs_info = NULL; 3874f6830165SManish Katiyar kfree(sbi->s_blockgroup_lock); 3875ac27a0ecSDave Kleikamp kfree(sbi); 3876dcc7dae3SCyrill Gorcunov out_free_orig: 3877d4c402d9SCurt Wohlgemuth kfree(orig_data); 38781d1fe1eeSDavid Howells return ret; 3879ac27a0ecSDave Kleikamp } 3880ac27a0ecSDave Kleikamp 3881ac27a0ecSDave Kleikamp /* 3882ac27a0ecSDave Kleikamp * Setup any per-fs journal parameters now. We'll do this both on 3883ac27a0ecSDave Kleikamp * initial mount, once the journal has been initialised but before we've 3884ac27a0ecSDave Kleikamp * done any recovery; and again on any subsequent remount. 3885ac27a0ecSDave Kleikamp */ 3886617ba13bSMingming Cao static void ext4_init_journal_params(struct super_block *sb, journal_t *journal) 3887ac27a0ecSDave Kleikamp { 3888617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 3889ac27a0ecSDave Kleikamp 3890ac27a0ecSDave Kleikamp journal->j_commit_interval = sbi->s_commit_interval; 389130773840STheodore Ts'o journal->j_min_batch_time = sbi->s_min_batch_time; 389230773840STheodore Ts'o journal->j_max_batch_time = sbi->s_max_batch_time; 3893ac27a0ecSDave Kleikamp 3894a931da6aSTheodore Ts'o write_lock(&journal->j_state_lock); 3895ac27a0ecSDave Kleikamp if (test_opt(sb, BARRIER)) 3896dab291afSMingming Cao journal->j_flags |= JBD2_BARRIER; 3897ac27a0ecSDave Kleikamp else 3898dab291afSMingming Cao journal->j_flags &= ~JBD2_BARRIER; 38995bf5683aSHidehiro Kawai if (test_opt(sb, DATA_ERR_ABORT)) 39005bf5683aSHidehiro Kawai journal->j_flags |= JBD2_ABORT_ON_SYNCDATA_ERR; 39015bf5683aSHidehiro Kawai else 39025bf5683aSHidehiro Kawai journal->j_flags &= ~JBD2_ABORT_ON_SYNCDATA_ERR; 3903a931da6aSTheodore Ts'o write_unlock(&journal->j_state_lock); 3904ac27a0ecSDave Kleikamp } 3905ac27a0ecSDave Kleikamp 3906617ba13bSMingming Cao static journal_t *ext4_get_journal(struct super_block *sb, 3907ac27a0ecSDave Kleikamp unsigned int journal_inum) 3908ac27a0ecSDave Kleikamp { 3909ac27a0ecSDave Kleikamp struct inode *journal_inode; 3910ac27a0ecSDave Kleikamp journal_t *journal; 3911ac27a0ecSDave Kleikamp 39120390131bSFrank Mayhar BUG_ON(!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)); 39130390131bSFrank Mayhar 3914ac27a0ecSDave Kleikamp /* First, test for the existence of a valid inode on disk. Bad 3915ac27a0ecSDave Kleikamp * things happen if we iget() an unused inode, as the subsequent 3916ac27a0ecSDave Kleikamp * iput() will try to delete it. */ 3917ac27a0ecSDave Kleikamp 39181d1fe1eeSDavid Howells journal_inode = ext4_iget(sb, journal_inum); 39191d1fe1eeSDavid Howells if (IS_ERR(journal_inode)) { 3920b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "no journal found"); 3921ac27a0ecSDave Kleikamp return NULL; 3922ac27a0ecSDave Kleikamp } 3923ac27a0ecSDave Kleikamp if (!journal_inode->i_nlink) { 3924ac27a0ecSDave Kleikamp make_bad_inode(journal_inode); 3925ac27a0ecSDave Kleikamp iput(journal_inode); 3926b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "journal inode is deleted"); 3927ac27a0ecSDave Kleikamp return NULL; 3928ac27a0ecSDave Kleikamp } 3929ac27a0ecSDave Kleikamp 3930e5f8eab8STheodore Ts'o jbd_debug(2, "Journal inode found at %p: %lld bytes\n", 3931ac27a0ecSDave Kleikamp journal_inode, journal_inode->i_size); 39321d1fe1eeSDavid Howells if (!S_ISREG(journal_inode->i_mode)) { 3933b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "invalid journal inode"); 3934ac27a0ecSDave Kleikamp iput(journal_inode); 3935ac27a0ecSDave Kleikamp return NULL; 3936ac27a0ecSDave Kleikamp } 3937ac27a0ecSDave Kleikamp 3938dab291afSMingming Cao journal = jbd2_journal_init_inode(journal_inode); 3939ac27a0ecSDave Kleikamp if (!journal) { 3940b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "Could not load journal inode"); 3941ac27a0ecSDave Kleikamp iput(journal_inode); 3942ac27a0ecSDave Kleikamp return NULL; 3943ac27a0ecSDave Kleikamp } 3944ac27a0ecSDave Kleikamp journal->j_private = sb; 3945617ba13bSMingming Cao ext4_init_journal_params(sb, journal); 3946ac27a0ecSDave Kleikamp return journal; 3947ac27a0ecSDave Kleikamp } 3948ac27a0ecSDave Kleikamp 3949617ba13bSMingming Cao static journal_t *ext4_get_dev_journal(struct super_block *sb, 3950ac27a0ecSDave Kleikamp dev_t j_dev) 3951ac27a0ecSDave Kleikamp { 3952ac27a0ecSDave Kleikamp struct buffer_head *bh; 3953ac27a0ecSDave Kleikamp journal_t *journal; 3954617ba13bSMingming Cao ext4_fsblk_t start; 3955617ba13bSMingming Cao ext4_fsblk_t len; 3956ac27a0ecSDave Kleikamp int hblock, blocksize; 3957617ba13bSMingming Cao ext4_fsblk_t sb_block; 3958ac27a0ecSDave Kleikamp unsigned long offset; 3959617ba13bSMingming Cao struct ext4_super_block *es; 3960ac27a0ecSDave Kleikamp struct block_device *bdev; 3961ac27a0ecSDave Kleikamp 39620390131bSFrank Mayhar BUG_ON(!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)); 39630390131bSFrank Mayhar 3964b31e1552SEric Sandeen bdev = ext4_blkdev_get(j_dev, sb); 3965ac27a0ecSDave Kleikamp if (bdev == NULL) 3966ac27a0ecSDave Kleikamp return NULL; 3967ac27a0ecSDave Kleikamp 3968ac27a0ecSDave Kleikamp blocksize = sb->s_blocksize; 3969e1defc4fSMartin K. Petersen hblock = bdev_logical_block_size(bdev); 3970ac27a0ecSDave Kleikamp if (blocksize < hblock) { 3971b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3972b31e1552SEric Sandeen "blocksize too small for journal device"); 3973ac27a0ecSDave Kleikamp goto out_bdev; 3974ac27a0ecSDave Kleikamp } 3975ac27a0ecSDave Kleikamp 3976617ba13bSMingming Cao sb_block = EXT4_MIN_BLOCK_SIZE / blocksize; 3977617ba13bSMingming Cao offset = EXT4_MIN_BLOCK_SIZE % blocksize; 3978ac27a0ecSDave Kleikamp set_blocksize(bdev, blocksize); 3979ac27a0ecSDave Kleikamp if (!(bh = __bread(bdev, sb_block, blocksize))) { 3980b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "couldn't read superblock of " 3981b31e1552SEric Sandeen "external journal"); 3982ac27a0ecSDave Kleikamp goto out_bdev; 3983ac27a0ecSDave Kleikamp } 3984ac27a0ecSDave Kleikamp 3985617ba13bSMingming Cao es = (struct ext4_super_block *) (((char *)bh->b_data) + offset); 3986617ba13bSMingming Cao if ((le16_to_cpu(es->s_magic) != EXT4_SUPER_MAGIC) || 3987ac27a0ecSDave Kleikamp !(le32_to_cpu(es->s_feature_incompat) & 3988617ba13bSMingming Cao EXT4_FEATURE_INCOMPAT_JOURNAL_DEV)) { 3989b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "external journal has " 3990b31e1552SEric Sandeen "bad superblock"); 3991ac27a0ecSDave Kleikamp brelse(bh); 3992ac27a0ecSDave Kleikamp goto out_bdev; 3993ac27a0ecSDave Kleikamp } 3994ac27a0ecSDave Kleikamp 3995617ba13bSMingming Cao if (memcmp(EXT4_SB(sb)->s_es->s_journal_uuid, es->s_uuid, 16)) { 3996b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "journal UUID does not match"); 3997ac27a0ecSDave Kleikamp brelse(bh); 3998ac27a0ecSDave Kleikamp goto out_bdev; 3999ac27a0ecSDave Kleikamp } 4000ac27a0ecSDave Kleikamp 4001bd81d8eeSLaurent Vivier len = ext4_blocks_count(es); 4002ac27a0ecSDave Kleikamp start = sb_block + 1; 4003ac27a0ecSDave Kleikamp brelse(bh); /* we're done with the superblock */ 4004ac27a0ecSDave Kleikamp 4005dab291afSMingming Cao journal = jbd2_journal_init_dev(bdev, sb->s_bdev, 4006ac27a0ecSDave Kleikamp start, len, blocksize); 4007ac27a0ecSDave Kleikamp if (!journal) { 4008b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "failed to create device journal"); 4009ac27a0ecSDave Kleikamp goto out_bdev; 4010ac27a0ecSDave Kleikamp } 4011ac27a0ecSDave Kleikamp journal->j_private = sb; 4012ac27a0ecSDave Kleikamp ll_rw_block(READ, 1, &journal->j_sb_buffer); 4013ac27a0ecSDave Kleikamp wait_on_buffer(journal->j_sb_buffer); 4014ac27a0ecSDave Kleikamp if (!buffer_uptodate(journal->j_sb_buffer)) { 4015b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "I/O error on journal device"); 4016ac27a0ecSDave Kleikamp goto out_journal; 4017ac27a0ecSDave Kleikamp } 4018ac27a0ecSDave Kleikamp if (be32_to_cpu(journal->j_superblock->s_nr_users) != 1) { 4019b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "External journal has more than one " 4020b31e1552SEric Sandeen "user (unsupported) - %d", 4021ac27a0ecSDave Kleikamp be32_to_cpu(journal->j_superblock->s_nr_users)); 4022ac27a0ecSDave Kleikamp goto out_journal; 4023ac27a0ecSDave Kleikamp } 4024617ba13bSMingming Cao EXT4_SB(sb)->journal_bdev = bdev; 4025617ba13bSMingming Cao ext4_init_journal_params(sb, journal); 4026ac27a0ecSDave Kleikamp return journal; 40270b8e58a1SAndreas Dilger 4028ac27a0ecSDave Kleikamp out_journal: 4029dab291afSMingming Cao jbd2_journal_destroy(journal); 4030ac27a0ecSDave Kleikamp out_bdev: 4031617ba13bSMingming Cao ext4_blkdev_put(bdev); 4032ac27a0ecSDave Kleikamp return NULL; 4033ac27a0ecSDave Kleikamp } 4034ac27a0ecSDave Kleikamp 4035617ba13bSMingming Cao static int ext4_load_journal(struct super_block *sb, 4036617ba13bSMingming Cao struct ext4_super_block *es, 4037ac27a0ecSDave Kleikamp unsigned long journal_devnum) 4038ac27a0ecSDave Kleikamp { 4039ac27a0ecSDave Kleikamp journal_t *journal; 4040ac27a0ecSDave Kleikamp unsigned int journal_inum = le32_to_cpu(es->s_journal_inum); 4041ac27a0ecSDave Kleikamp dev_t journal_dev; 4042ac27a0ecSDave Kleikamp int err = 0; 4043ac27a0ecSDave Kleikamp int really_read_only; 4044ac27a0ecSDave Kleikamp 40450390131bSFrank Mayhar BUG_ON(!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)); 40460390131bSFrank Mayhar 4047ac27a0ecSDave Kleikamp if (journal_devnum && 4048ac27a0ecSDave Kleikamp journal_devnum != le32_to_cpu(es->s_journal_dev)) { 4049b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "external journal device major/minor " 4050b31e1552SEric Sandeen "numbers have changed"); 4051ac27a0ecSDave Kleikamp journal_dev = new_decode_dev(journal_devnum); 4052ac27a0ecSDave Kleikamp } else 4053ac27a0ecSDave Kleikamp journal_dev = new_decode_dev(le32_to_cpu(es->s_journal_dev)); 4054ac27a0ecSDave Kleikamp 4055ac27a0ecSDave Kleikamp really_read_only = bdev_read_only(sb->s_bdev); 4056ac27a0ecSDave Kleikamp 4057ac27a0ecSDave Kleikamp /* 4058ac27a0ecSDave Kleikamp * Are we loading a blank journal or performing recovery after a 4059ac27a0ecSDave Kleikamp * crash? For recovery, we need to check in advance whether we 4060ac27a0ecSDave Kleikamp * can get read-write access to the device. 4061ac27a0ecSDave Kleikamp */ 4062617ba13bSMingming Cao if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER)) { 4063ac27a0ecSDave Kleikamp if (sb->s_flags & MS_RDONLY) { 4064b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "INFO: recovery " 4065b31e1552SEric Sandeen "required on readonly filesystem"); 4066ac27a0ecSDave Kleikamp if (really_read_only) { 4067b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "write access " 4068b31e1552SEric Sandeen "unavailable, cannot proceed"); 4069ac27a0ecSDave Kleikamp return -EROFS; 4070ac27a0ecSDave Kleikamp } 4071b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "write access will " 4072b31e1552SEric Sandeen "be enabled during recovery"); 4073ac27a0ecSDave Kleikamp } 4074ac27a0ecSDave Kleikamp } 4075ac27a0ecSDave Kleikamp 4076ac27a0ecSDave Kleikamp if (journal_inum && journal_dev) { 4077b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "filesystem has both journal " 4078b31e1552SEric Sandeen "and inode journals!"); 4079ac27a0ecSDave Kleikamp return -EINVAL; 4080ac27a0ecSDave Kleikamp } 4081ac27a0ecSDave Kleikamp 4082ac27a0ecSDave Kleikamp if (journal_inum) { 4083617ba13bSMingming Cao if (!(journal = ext4_get_journal(sb, journal_inum))) 4084ac27a0ecSDave Kleikamp return -EINVAL; 4085ac27a0ecSDave Kleikamp } else { 4086617ba13bSMingming Cao if (!(journal = ext4_get_dev_journal(sb, journal_dev))) 4087ac27a0ecSDave Kleikamp return -EINVAL; 4088ac27a0ecSDave Kleikamp } 4089ac27a0ecSDave Kleikamp 409090576c0bSTheodore Ts'o if (!(journal->j_flags & JBD2_BARRIER)) 4091b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "barriers disabled"); 40924776004fSTheodore Ts'o 4093ac27a0ecSDave Kleikamp if (!really_read_only && test_opt(sb, UPDATE_JOURNAL)) { 4094dab291afSMingming Cao err = jbd2_journal_update_format(journal); 4095ac27a0ecSDave Kleikamp if (err) { 4096b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "error updating journal"); 4097dab291afSMingming Cao jbd2_journal_destroy(journal); 4098ac27a0ecSDave Kleikamp return err; 4099ac27a0ecSDave Kleikamp } 4100ac27a0ecSDave Kleikamp } 4101ac27a0ecSDave Kleikamp 4102617ba13bSMingming Cao if (!EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER)) 4103dab291afSMingming Cao err = jbd2_journal_wipe(journal, !really_read_only); 41041c13d5c0STheodore Ts'o if (!err) { 41051c13d5c0STheodore Ts'o char *save = kmalloc(EXT4_S_ERR_LEN, GFP_KERNEL); 41061c13d5c0STheodore Ts'o if (save) 41071c13d5c0STheodore Ts'o memcpy(save, ((char *) es) + 41081c13d5c0STheodore Ts'o EXT4_S_ERR_START, EXT4_S_ERR_LEN); 4109dab291afSMingming Cao err = jbd2_journal_load(journal); 41101c13d5c0STheodore Ts'o if (save) 41111c13d5c0STheodore Ts'o memcpy(((char *) es) + EXT4_S_ERR_START, 41121c13d5c0STheodore Ts'o save, EXT4_S_ERR_LEN); 41131c13d5c0STheodore Ts'o kfree(save); 41141c13d5c0STheodore Ts'o } 4115ac27a0ecSDave Kleikamp 4116ac27a0ecSDave Kleikamp if (err) { 4117b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "error loading journal"); 4118dab291afSMingming Cao jbd2_journal_destroy(journal); 4119ac27a0ecSDave Kleikamp return err; 4120ac27a0ecSDave Kleikamp } 4121ac27a0ecSDave Kleikamp 4122617ba13bSMingming Cao EXT4_SB(sb)->s_journal = journal; 4123617ba13bSMingming Cao ext4_clear_journal_err(sb, es); 4124ac27a0ecSDave Kleikamp 4125c41303ceSMaciej Żenczykowski if (!really_read_only && journal_devnum && 4126ac27a0ecSDave Kleikamp journal_devnum != le32_to_cpu(es->s_journal_dev)) { 4127ac27a0ecSDave Kleikamp es->s_journal_dev = cpu_to_le32(journal_devnum); 4128ac27a0ecSDave Kleikamp 4129ac27a0ecSDave Kleikamp /* Make sure we flush the recovery flag to disk. */ 4130e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 4131ac27a0ecSDave Kleikamp } 4132ac27a0ecSDave Kleikamp 4133ac27a0ecSDave Kleikamp return 0; 4134ac27a0ecSDave Kleikamp } 4135ac27a0ecSDave Kleikamp 4136e2d67052STheodore Ts'o static int ext4_commit_super(struct super_block *sb, int sync) 4137ac27a0ecSDave Kleikamp { 4138e2d67052STheodore Ts'o struct ext4_super_block *es = EXT4_SB(sb)->s_es; 4139617ba13bSMingming Cao struct buffer_head *sbh = EXT4_SB(sb)->s_sbh; 4140c4be0c1dSTakashi Sato int error = 0; 4141ac27a0ecSDave Kleikamp 41427c2e7087STheodore Ts'o if (!sbh || block_device_ejected(sb)) 4143c4be0c1dSTakashi Sato return error; 4144914258bfSTheodore Ts'o if (buffer_write_io_error(sbh)) { 4145914258bfSTheodore Ts'o /* 4146914258bfSTheodore Ts'o * Oh, dear. A previous attempt to write the 4147914258bfSTheodore Ts'o * superblock failed. This could happen because the 4148914258bfSTheodore Ts'o * USB device was yanked out. Or it could happen to 4149914258bfSTheodore Ts'o * be a transient write error and maybe the block will 4150914258bfSTheodore Ts'o * be remapped. Nothing we can do but to retry the 4151914258bfSTheodore Ts'o * write and hope for the best. 4152914258bfSTheodore Ts'o */ 4153b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "previous I/O error to " 4154b31e1552SEric Sandeen "superblock detected"); 4155914258bfSTheodore Ts'o clear_buffer_write_io_error(sbh); 4156914258bfSTheodore Ts'o set_buffer_uptodate(sbh); 4157914258bfSTheodore Ts'o } 415871290b36STheodore Ts'o /* 415971290b36STheodore Ts'o * If the file system is mounted read-only, don't update the 416071290b36STheodore Ts'o * superblock write time. This avoids updating the superblock 416171290b36STheodore Ts'o * write time when we are mounting the root file system 416271290b36STheodore Ts'o * read/only but we need to replay the journal; at that point, 416371290b36STheodore Ts'o * for people who are east of GMT and who make their clock 416471290b36STheodore Ts'o * tick in localtime for Windows bug-for-bug compatibility, 416571290b36STheodore Ts'o * the clock is set in the future, and this will cause e2fsck 416671290b36STheodore Ts'o * to complain and force a full file system check. 416771290b36STheodore Ts'o */ 416871290b36STheodore Ts'o if (!(sb->s_flags & MS_RDONLY)) 4169ac27a0ecSDave Kleikamp es->s_wtime = cpu_to_le32(get_seconds()); 4170f613dfcbSTheodore Ts'o if (sb->s_bdev->bd_part) 4171afc32f7eSTheodore Ts'o es->s_kbytes_written = 4172afc32f7eSTheodore Ts'o cpu_to_le64(EXT4_SB(sb)->s_kbytes_written + 4173afc32f7eSTheodore Ts'o ((part_stat_read(sb->s_bdev->bd_part, sectors[1]) - 4174afc32f7eSTheodore Ts'o EXT4_SB(sb)->s_sectors_written_start) >> 1)); 4175f613dfcbSTheodore Ts'o else 4176f613dfcbSTheodore Ts'o es->s_kbytes_written = 4177f613dfcbSTheodore Ts'o cpu_to_le64(EXT4_SB(sb)->s_kbytes_written); 417857042651STheodore Ts'o ext4_free_blocks_count_set(es, 417957042651STheodore Ts'o EXT4_C2B(EXT4_SB(sb), percpu_counter_sum_positive( 418057042651STheodore Ts'o &EXT4_SB(sb)->s_freeclusters_counter))); 41817f93cff9STheodore Ts'o es->s_free_inodes_count = 41827f93cff9STheodore Ts'o cpu_to_le32(percpu_counter_sum_positive( 41835d1b1b3fSAneesh Kumar K.V &EXT4_SB(sb)->s_freeinodes_counter)); 41847234ab2aSTheodore Ts'o sb->s_dirt = 0; 4185ac27a0ecSDave Kleikamp BUFFER_TRACE(sbh, "marking dirty"); 4186ac27a0ecSDave Kleikamp mark_buffer_dirty(sbh); 4187914258bfSTheodore Ts'o if (sync) { 4188c4be0c1dSTakashi Sato error = sync_dirty_buffer(sbh); 4189c4be0c1dSTakashi Sato if (error) 4190c4be0c1dSTakashi Sato return error; 4191c4be0c1dSTakashi Sato 4192c4be0c1dSTakashi Sato error = buffer_write_io_error(sbh); 4193c4be0c1dSTakashi Sato if (error) { 4194b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "I/O error while writing " 4195b31e1552SEric Sandeen "superblock"); 4196914258bfSTheodore Ts'o clear_buffer_write_io_error(sbh); 4197914258bfSTheodore Ts'o set_buffer_uptodate(sbh); 4198914258bfSTheodore Ts'o } 4199914258bfSTheodore Ts'o } 4200c4be0c1dSTakashi Sato return error; 4201ac27a0ecSDave Kleikamp } 4202ac27a0ecSDave Kleikamp 4203ac27a0ecSDave Kleikamp /* 4204ac27a0ecSDave Kleikamp * Have we just finished recovery? If so, and if we are mounting (or 4205ac27a0ecSDave Kleikamp * remounting) the filesystem readonly, then we will end up with a 4206ac27a0ecSDave Kleikamp * consistent fs on disk. Record that fact. 4207ac27a0ecSDave Kleikamp */ 4208617ba13bSMingming Cao static void ext4_mark_recovery_complete(struct super_block *sb, 4209617ba13bSMingming Cao struct ext4_super_block *es) 4210ac27a0ecSDave Kleikamp { 4211617ba13bSMingming Cao journal_t *journal = EXT4_SB(sb)->s_journal; 4212ac27a0ecSDave Kleikamp 42130390131bSFrank Mayhar if (!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)) { 42140390131bSFrank Mayhar BUG_ON(journal != NULL); 42150390131bSFrank Mayhar return; 42160390131bSFrank Mayhar } 4217dab291afSMingming Cao jbd2_journal_lock_updates(journal); 42187ffe1ea8SHidehiro Kawai if (jbd2_journal_flush(journal) < 0) 42197ffe1ea8SHidehiro Kawai goto out; 42207ffe1ea8SHidehiro Kawai 4221617ba13bSMingming Cao if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER) && 4222ac27a0ecSDave Kleikamp sb->s_flags & MS_RDONLY) { 4223617ba13bSMingming Cao EXT4_CLEAR_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); 4224e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 4225ac27a0ecSDave Kleikamp } 42267ffe1ea8SHidehiro Kawai 42277ffe1ea8SHidehiro Kawai out: 4228dab291afSMingming Cao jbd2_journal_unlock_updates(journal); 4229ac27a0ecSDave Kleikamp } 4230ac27a0ecSDave Kleikamp 4231ac27a0ecSDave Kleikamp /* 4232ac27a0ecSDave Kleikamp * If we are mounting (or read-write remounting) a filesystem whose journal 4233ac27a0ecSDave Kleikamp * has recorded an error from a previous lifetime, move that error to the 4234ac27a0ecSDave Kleikamp * main filesystem now. 4235ac27a0ecSDave Kleikamp */ 4236617ba13bSMingming Cao static void ext4_clear_journal_err(struct super_block *sb, 4237617ba13bSMingming Cao struct ext4_super_block *es) 4238ac27a0ecSDave Kleikamp { 4239ac27a0ecSDave Kleikamp journal_t *journal; 4240ac27a0ecSDave Kleikamp int j_errno; 4241ac27a0ecSDave Kleikamp const char *errstr; 4242ac27a0ecSDave Kleikamp 42430390131bSFrank Mayhar BUG_ON(!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)); 42440390131bSFrank Mayhar 4245617ba13bSMingming Cao journal = EXT4_SB(sb)->s_journal; 4246ac27a0ecSDave Kleikamp 4247ac27a0ecSDave Kleikamp /* 4248ac27a0ecSDave Kleikamp * Now check for any error status which may have been recorded in the 4249617ba13bSMingming Cao * journal by a prior ext4_error() or ext4_abort() 4250ac27a0ecSDave Kleikamp */ 4251ac27a0ecSDave Kleikamp 4252dab291afSMingming Cao j_errno = jbd2_journal_errno(journal); 4253ac27a0ecSDave Kleikamp if (j_errno) { 4254ac27a0ecSDave Kleikamp char nbuf[16]; 4255ac27a0ecSDave Kleikamp 4256617ba13bSMingming Cao errstr = ext4_decode_error(sb, j_errno, nbuf); 425712062dddSEric Sandeen ext4_warning(sb, "Filesystem error recorded " 4258ac27a0ecSDave Kleikamp "from previous mount: %s", errstr); 425912062dddSEric Sandeen ext4_warning(sb, "Marking fs in need of filesystem check."); 4260ac27a0ecSDave Kleikamp 4261617ba13bSMingming Cao EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; 4262617ba13bSMingming Cao es->s_state |= cpu_to_le16(EXT4_ERROR_FS); 4263e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 4264ac27a0ecSDave Kleikamp 4265dab291afSMingming Cao jbd2_journal_clear_err(journal); 4266ac27a0ecSDave Kleikamp } 4267ac27a0ecSDave Kleikamp } 4268ac27a0ecSDave Kleikamp 4269ac27a0ecSDave Kleikamp /* 4270ac27a0ecSDave Kleikamp * Force the running and committing transactions to commit, 4271ac27a0ecSDave Kleikamp * and wait on the commit. 4272ac27a0ecSDave Kleikamp */ 4273617ba13bSMingming Cao int ext4_force_commit(struct super_block *sb) 4274ac27a0ecSDave Kleikamp { 4275ac27a0ecSDave Kleikamp journal_t *journal; 42760390131bSFrank Mayhar int ret = 0; 4277ac27a0ecSDave Kleikamp 4278ac27a0ecSDave Kleikamp if (sb->s_flags & MS_RDONLY) 4279ac27a0ecSDave Kleikamp return 0; 4280ac27a0ecSDave Kleikamp 4281617ba13bSMingming Cao journal = EXT4_SB(sb)->s_journal; 42826b0310fbSEric Sandeen if (journal) { 4283437f88ccSEric Sandeen vfs_check_frozen(sb, SB_FREEZE_TRANS); 4284617ba13bSMingming Cao ret = ext4_journal_force_commit(journal); 42856b0310fbSEric Sandeen } 42860390131bSFrank Mayhar 4287ac27a0ecSDave Kleikamp return ret; 4288ac27a0ecSDave Kleikamp } 4289ac27a0ecSDave Kleikamp 4290617ba13bSMingming Cao static void ext4_write_super(struct super_block *sb) 4291ac27a0ecSDave Kleikamp { 4292ebc1ac16SChristoph Hellwig lock_super(sb); 4293e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 4294ebc1ac16SChristoph Hellwig unlock_super(sb); 42950390131bSFrank Mayhar } 4296ac27a0ecSDave Kleikamp 4297617ba13bSMingming Cao static int ext4_sync_fs(struct super_block *sb, int wait) 4298ac27a0ecSDave Kleikamp { 429914ce0cb4STheodore Ts'o int ret = 0; 43009eddacf9SJan Kara tid_t target; 43018d5d02e6SMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 4302ac27a0ecSDave Kleikamp 43039bffad1eSTheodore Ts'o trace_ext4_sync_fs(sb, wait); 43048d5d02e6SMingming Cao flush_workqueue(sbi->dio_unwritten_wq); 43058d5d02e6SMingming Cao if (jbd2_journal_start_commit(sbi->s_journal, &target)) { 4306ac27a0ecSDave Kleikamp if (wait) 43078d5d02e6SMingming Cao jbd2_log_wait_commit(sbi->s_journal, target); 43080390131bSFrank Mayhar } 430914ce0cb4STheodore Ts'o return ret; 4310ac27a0ecSDave Kleikamp } 4311ac27a0ecSDave Kleikamp 4312ac27a0ecSDave Kleikamp /* 4313ac27a0ecSDave Kleikamp * LVM calls this function before a (read-only) snapshot is created. This 4314ac27a0ecSDave Kleikamp * gives us a chance to flush the journal completely and mark the fs clean. 4315be4f27d3SYongqiang Yang * 4316be4f27d3SYongqiang Yang * Note that only this function cannot bring a filesystem to be in a clean 4317be4f27d3SYongqiang Yang * state independently, because ext4 prevents a new handle from being started 4318be4f27d3SYongqiang Yang * by @sb->s_frozen, which stays in an upper layer. It thus needs help from 4319be4f27d3SYongqiang Yang * the upper layer. 4320ac27a0ecSDave Kleikamp */ 4321c4be0c1dSTakashi Sato static int ext4_freeze(struct super_block *sb) 4322ac27a0ecSDave Kleikamp { 4323c4be0c1dSTakashi Sato int error = 0; 4324c4be0c1dSTakashi Sato journal_t *journal; 4325ac27a0ecSDave Kleikamp 43269ca92389STheodore Ts'o if (sb->s_flags & MS_RDONLY) 43279ca92389STheodore Ts'o return 0; 43289ca92389STheodore Ts'o 4329c4be0c1dSTakashi Sato journal = EXT4_SB(sb)->s_journal; 4330ac27a0ecSDave Kleikamp 4331ac27a0ecSDave Kleikamp /* Now we set up the journal barrier. */ 4332dab291afSMingming Cao jbd2_journal_lock_updates(journal); 43337ffe1ea8SHidehiro Kawai 43347ffe1ea8SHidehiro Kawai /* 43359ca92389STheodore Ts'o * Don't clear the needs_recovery flag if we failed to flush 43369ca92389STheodore Ts'o * the journal. 43377ffe1ea8SHidehiro Kawai */ 4338c4be0c1dSTakashi Sato error = jbd2_journal_flush(journal); 43396b0310fbSEric Sandeen if (error < 0) 43406b0310fbSEric Sandeen goto out; 4341ac27a0ecSDave Kleikamp 4342ac27a0ecSDave Kleikamp /* Journal blocked and flushed, clear needs_recovery flag. */ 4343617ba13bSMingming Cao EXT4_CLEAR_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); 4344e2d67052STheodore Ts'o error = ext4_commit_super(sb, 1); 43456b0310fbSEric Sandeen out: 43466b0310fbSEric Sandeen /* we rely on s_frozen to stop further updates */ 43476b0310fbSEric Sandeen jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal); 43486b0310fbSEric Sandeen return error; 4349ac27a0ecSDave Kleikamp } 4350ac27a0ecSDave Kleikamp 4351ac27a0ecSDave Kleikamp /* 4352ac27a0ecSDave Kleikamp * Called by LVM after the snapshot is done. We need to reset the RECOVER 4353ac27a0ecSDave Kleikamp * flag here, even though the filesystem is not technically dirty yet. 4354ac27a0ecSDave Kleikamp */ 4355c4be0c1dSTakashi Sato static int ext4_unfreeze(struct super_block *sb) 4356ac27a0ecSDave Kleikamp { 43579ca92389STheodore Ts'o if (sb->s_flags & MS_RDONLY) 43589ca92389STheodore Ts'o return 0; 43599ca92389STheodore Ts'o 4360ac27a0ecSDave Kleikamp lock_super(sb); 43619ca92389STheodore Ts'o /* Reset the needs_recovery flag before the fs is unlocked. */ 4362617ba13bSMingming Cao EXT4_SET_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); 4363e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 4364ac27a0ecSDave Kleikamp unlock_super(sb); 4365c4be0c1dSTakashi Sato return 0; 4366ac27a0ecSDave Kleikamp } 4367ac27a0ecSDave Kleikamp 4368673c6100STheodore Ts'o /* 4369673c6100STheodore Ts'o * Structure to save mount options for ext4_remount's benefit 4370673c6100STheodore Ts'o */ 4371673c6100STheodore Ts'o struct ext4_mount_options { 4372673c6100STheodore Ts'o unsigned long s_mount_opt; 4373a2595b8aSTheodore Ts'o unsigned long s_mount_opt2; 4374673c6100STheodore Ts'o uid_t s_resuid; 4375673c6100STheodore Ts'o gid_t s_resgid; 4376673c6100STheodore Ts'o unsigned long s_commit_interval; 4377673c6100STheodore Ts'o u32 s_min_batch_time, s_max_batch_time; 4378673c6100STheodore Ts'o #ifdef CONFIG_QUOTA 4379673c6100STheodore Ts'o int s_jquota_fmt; 4380673c6100STheodore Ts'o char *s_qf_names[MAXQUOTAS]; 4381673c6100STheodore Ts'o #endif 4382673c6100STheodore Ts'o }; 4383673c6100STheodore Ts'o 4384617ba13bSMingming Cao static int ext4_remount(struct super_block *sb, int *flags, char *data) 4385ac27a0ecSDave Kleikamp { 4386617ba13bSMingming Cao struct ext4_super_block *es; 4387617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 4388617ba13bSMingming Cao ext4_fsblk_t n_blocks_count = 0; 4389ac27a0ecSDave Kleikamp unsigned long old_sb_flags; 4390617ba13bSMingming Cao struct ext4_mount_options old_opts; 4391c79d967dSChristoph Hellwig int enable_quota = 0; 43928a266467STheodore Ts'o ext4_group_t g; 4393b3881f74STheodore Ts'o unsigned int journal_ioprio = DEFAULT_JOURNAL_IOPRIO; 4394c5e06d10SJohann Lombardi int err = 0; 4395ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 4396ac27a0ecSDave Kleikamp int i; 4397ac27a0ecSDave Kleikamp #endif 4398d4c402d9SCurt Wohlgemuth char *orig_data = kstrdup(data, GFP_KERNEL); 4399ac27a0ecSDave Kleikamp 4400ac27a0ecSDave Kleikamp /* Store the original options */ 4401bbd6851aSAl Viro lock_super(sb); 4402ac27a0ecSDave Kleikamp old_sb_flags = sb->s_flags; 4403ac27a0ecSDave Kleikamp old_opts.s_mount_opt = sbi->s_mount_opt; 4404a2595b8aSTheodore Ts'o old_opts.s_mount_opt2 = sbi->s_mount_opt2; 4405ac27a0ecSDave Kleikamp old_opts.s_resuid = sbi->s_resuid; 4406ac27a0ecSDave Kleikamp old_opts.s_resgid = sbi->s_resgid; 4407ac27a0ecSDave Kleikamp old_opts.s_commit_interval = sbi->s_commit_interval; 440830773840STheodore Ts'o old_opts.s_min_batch_time = sbi->s_min_batch_time; 440930773840STheodore Ts'o old_opts.s_max_batch_time = sbi->s_max_batch_time; 4410ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 4411ac27a0ecSDave Kleikamp old_opts.s_jquota_fmt = sbi->s_jquota_fmt; 4412ac27a0ecSDave Kleikamp for (i = 0; i < MAXQUOTAS; i++) 4413ac27a0ecSDave Kleikamp old_opts.s_qf_names[i] = sbi->s_qf_names[i]; 4414ac27a0ecSDave Kleikamp #endif 4415b3881f74STheodore Ts'o if (sbi->s_journal && sbi->s_journal->j_task->io_context) 4416b3881f74STheodore Ts'o journal_ioprio = sbi->s_journal->j_task->io_context->ioprio; 4417ac27a0ecSDave Kleikamp 4418ac27a0ecSDave Kleikamp /* 4419ac27a0ecSDave Kleikamp * Allow the "check" option to be passed as a remount option. 4420ac27a0ecSDave Kleikamp */ 4421b3881f74STheodore Ts'o if (!parse_options(data, sb, NULL, &journal_ioprio, 4422b3881f74STheodore Ts'o &n_blocks_count, 1)) { 4423ac27a0ecSDave Kleikamp err = -EINVAL; 4424ac27a0ecSDave Kleikamp goto restore_opts; 4425ac27a0ecSDave Kleikamp } 4426ac27a0ecSDave Kleikamp 44274ab2f15bSTheodore Ts'o if (sbi->s_mount_flags & EXT4_MF_FS_ABORTED) 4428c67d859eSTheodore Ts'o ext4_abort(sb, "Abort forced by user"); 4429ac27a0ecSDave Kleikamp 4430ac27a0ecSDave Kleikamp sb->s_flags = (sb->s_flags & ~MS_POSIXACL) | 4431482a7425SDmitry Monakhov (test_opt(sb, POSIX_ACL) ? MS_POSIXACL : 0); 4432ac27a0ecSDave Kleikamp 4433ac27a0ecSDave Kleikamp es = sbi->s_es; 4434ac27a0ecSDave Kleikamp 4435b3881f74STheodore Ts'o if (sbi->s_journal) { 4436617ba13bSMingming Cao ext4_init_journal_params(sb, sbi->s_journal); 4437b3881f74STheodore Ts'o set_task_ioprio(sbi->s_journal->j_task, journal_ioprio); 4438b3881f74STheodore Ts'o } 4439ac27a0ecSDave Kleikamp 4440ac27a0ecSDave Kleikamp if ((*flags & MS_RDONLY) != (sb->s_flags & MS_RDONLY) || 4441bd81d8eeSLaurent Vivier n_blocks_count > ext4_blocks_count(es)) { 44424ab2f15bSTheodore Ts'o if (sbi->s_mount_flags & EXT4_MF_FS_ABORTED) { 4443ac27a0ecSDave Kleikamp err = -EROFS; 4444ac27a0ecSDave Kleikamp goto restore_opts; 4445ac27a0ecSDave Kleikamp } 4446ac27a0ecSDave Kleikamp 4447ac27a0ecSDave Kleikamp if (*flags & MS_RDONLY) { 44480f0dd62fSChristoph Hellwig err = dquot_suspend(sb, -1); 44490f0dd62fSChristoph Hellwig if (err < 0) 4450c79d967dSChristoph Hellwig goto restore_opts; 4451c79d967dSChristoph Hellwig 4452ac27a0ecSDave Kleikamp /* 4453ac27a0ecSDave Kleikamp * First of all, the unconditional stuff we have to do 4454ac27a0ecSDave Kleikamp * to disable replay of the journal when we next remount 4455ac27a0ecSDave Kleikamp */ 4456ac27a0ecSDave Kleikamp sb->s_flags |= MS_RDONLY; 4457ac27a0ecSDave Kleikamp 4458ac27a0ecSDave Kleikamp /* 4459ac27a0ecSDave Kleikamp * OK, test if we are remounting a valid rw partition 4460ac27a0ecSDave Kleikamp * readonly, and if so set the rdonly flag and then 4461ac27a0ecSDave Kleikamp * mark the partition as valid again. 4462ac27a0ecSDave Kleikamp */ 4463617ba13bSMingming Cao if (!(es->s_state & cpu_to_le16(EXT4_VALID_FS)) && 4464617ba13bSMingming Cao (sbi->s_mount_state & EXT4_VALID_FS)) 4465ac27a0ecSDave Kleikamp es->s_state = cpu_to_le16(sbi->s_mount_state); 4466ac27a0ecSDave Kleikamp 4467a63c9eb2STheodore Ts'o if (sbi->s_journal) 4468617ba13bSMingming Cao ext4_mark_recovery_complete(sb, es); 4469ac27a0ecSDave Kleikamp } else { 4470a13fb1a4SEric Sandeen /* Make sure we can mount this feature set readwrite */ 4471a13fb1a4SEric Sandeen if (!ext4_feature_set_ok(sb, 0)) { 4472ac27a0ecSDave Kleikamp err = -EROFS; 4473ac27a0ecSDave Kleikamp goto restore_opts; 4474ac27a0ecSDave Kleikamp } 4475ead6596bSEric Sandeen /* 44768a266467STheodore Ts'o * Make sure the group descriptor checksums 44770b8e58a1SAndreas Dilger * are sane. If they aren't, refuse to remount r/w. 44788a266467STheodore Ts'o */ 44798a266467STheodore Ts'o for (g = 0; g < sbi->s_groups_count; g++) { 44808a266467STheodore Ts'o struct ext4_group_desc *gdp = 44818a266467STheodore Ts'o ext4_get_group_desc(sb, g, NULL); 44828a266467STheodore Ts'o 44838a266467STheodore Ts'o if (!ext4_group_desc_csum_verify(sbi, g, gdp)) { 4484b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 4485b31e1552SEric Sandeen "ext4_remount: Checksum for group %u failed (%u!=%u)", 44868a266467STheodore Ts'o g, le16_to_cpu(ext4_group_desc_csum(sbi, g, gdp)), 44878a266467STheodore Ts'o le16_to_cpu(gdp->bg_checksum)); 44888a266467STheodore Ts'o err = -EINVAL; 44898a266467STheodore Ts'o goto restore_opts; 44908a266467STheodore Ts'o } 44918a266467STheodore Ts'o } 44928a266467STheodore Ts'o 44938a266467STheodore Ts'o /* 4494ead6596bSEric Sandeen * If we have an unprocessed orphan list hanging 4495ead6596bSEric Sandeen * around from a previously readonly bdev mount, 4496ead6596bSEric Sandeen * require a full umount/remount for now. 4497ead6596bSEric Sandeen */ 4498ead6596bSEric Sandeen if (es->s_last_orphan) { 4499b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "Couldn't " 4500ead6596bSEric Sandeen "remount RDWR because of unprocessed " 4501ead6596bSEric Sandeen "orphan inode list. Please " 4502b31e1552SEric Sandeen "umount/remount instead"); 4503ead6596bSEric Sandeen err = -EINVAL; 4504ead6596bSEric Sandeen goto restore_opts; 4505ead6596bSEric Sandeen } 4506ead6596bSEric Sandeen 4507ac27a0ecSDave Kleikamp /* 4508ac27a0ecSDave Kleikamp * Mounting a RDONLY partition read-write, so reread 4509ac27a0ecSDave Kleikamp * and store the current valid flag. (It may have 4510ac27a0ecSDave Kleikamp * been changed by e2fsck since we originally mounted 4511ac27a0ecSDave Kleikamp * the partition.) 4512ac27a0ecSDave Kleikamp */ 45130390131bSFrank Mayhar if (sbi->s_journal) 4514617ba13bSMingming Cao ext4_clear_journal_err(sb, es); 4515ac27a0ecSDave Kleikamp sbi->s_mount_state = le16_to_cpu(es->s_state); 4516617ba13bSMingming Cao if ((err = ext4_group_extend(sb, es, n_blocks_count))) 4517ac27a0ecSDave Kleikamp goto restore_opts; 4518617ba13bSMingming Cao if (!ext4_setup_super(sb, es, 0)) 4519ac27a0ecSDave Kleikamp sb->s_flags &= ~MS_RDONLY; 4520c5e06d10SJohann Lombardi if (EXT4_HAS_INCOMPAT_FEATURE(sb, 4521c5e06d10SJohann Lombardi EXT4_FEATURE_INCOMPAT_MMP)) 4522c5e06d10SJohann Lombardi if (ext4_multi_mount_protect(sb, 4523c5e06d10SJohann Lombardi le64_to_cpu(es->s_mmp_block))) { 4524c5e06d10SJohann Lombardi err = -EROFS; 4525c5e06d10SJohann Lombardi goto restore_opts; 4526c5e06d10SJohann Lombardi } 4527c79d967dSChristoph Hellwig enable_quota = 1; 4528ac27a0ecSDave Kleikamp } 4529ac27a0ecSDave Kleikamp } 4530bfff6873SLukas Czerner 4531bfff6873SLukas Czerner /* 4532bfff6873SLukas Czerner * Reinitialize lazy itable initialization thread based on 4533bfff6873SLukas Czerner * current settings 4534bfff6873SLukas Czerner */ 4535bfff6873SLukas Czerner if ((sb->s_flags & MS_RDONLY) || !test_opt(sb, INIT_INODE_TABLE)) 4536bfff6873SLukas Czerner ext4_unregister_li_request(sb); 4537bfff6873SLukas Czerner else { 4538bfff6873SLukas Czerner ext4_group_t first_not_zeroed; 4539bfff6873SLukas Czerner first_not_zeroed = ext4_has_uninit_itable(sb); 4540bfff6873SLukas Czerner ext4_register_li_request(sb, first_not_zeroed); 4541bfff6873SLukas Czerner } 4542bfff6873SLukas Czerner 45436fd058f7STheodore Ts'o ext4_setup_system_zone(sb); 45440390131bSFrank Mayhar if (sbi->s_journal == NULL) 4545e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 45460390131bSFrank Mayhar 4547ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 4548ac27a0ecSDave Kleikamp /* Release old quota file names */ 4549ac27a0ecSDave Kleikamp for (i = 0; i < MAXQUOTAS; i++) 4550ac27a0ecSDave Kleikamp if (old_opts.s_qf_names[i] && 4551ac27a0ecSDave Kleikamp old_opts.s_qf_names[i] != sbi->s_qf_names[i]) 4552ac27a0ecSDave Kleikamp kfree(old_opts.s_qf_names[i]); 4553ac27a0ecSDave Kleikamp #endif 4554bbd6851aSAl Viro unlock_super(sb); 4555c79d967dSChristoph Hellwig if (enable_quota) 45560f0dd62fSChristoph Hellwig dquot_resume(sb, -1); 4557d4c402d9SCurt Wohlgemuth 4558d4c402d9SCurt Wohlgemuth ext4_msg(sb, KERN_INFO, "re-mounted. Opts: %s", orig_data); 4559d4c402d9SCurt Wohlgemuth kfree(orig_data); 4560ac27a0ecSDave Kleikamp return 0; 45610b8e58a1SAndreas Dilger 4562ac27a0ecSDave Kleikamp restore_opts: 4563ac27a0ecSDave Kleikamp sb->s_flags = old_sb_flags; 4564ac27a0ecSDave Kleikamp sbi->s_mount_opt = old_opts.s_mount_opt; 4565a2595b8aSTheodore Ts'o sbi->s_mount_opt2 = old_opts.s_mount_opt2; 4566ac27a0ecSDave Kleikamp sbi->s_resuid = old_opts.s_resuid; 4567ac27a0ecSDave Kleikamp sbi->s_resgid = old_opts.s_resgid; 4568ac27a0ecSDave Kleikamp sbi->s_commit_interval = old_opts.s_commit_interval; 456930773840STheodore Ts'o sbi->s_min_batch_time = old_opts.s_min_batch_time; 457030773840STheodore Ts'o sbi->s_max_batch_time = old_opts.s_max_batch_time; 4571ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 4572ac27a0ecSDave Kleikamp sbi->s_jquota_fmt = old_opts.s_jquota_fmt; 4573ac27a0ecSDave Kleikamp for (i = 0; i < MAXQUOTAS; i++) { 4574ac27a0ecSDave Kleikamp if (sbi->s_qf_names[i] && 4575ac27a0ecSDave Kleikamp old_opts.s_qf_names[i] != sbi->s_qf_names[i]) 4576ac27a0ecSDave Kleikamp kfree(sbi->s_qf_names[i]); 4577ac27a0ecSDave Kleikamp sbi->s_qf_names[i] = old_opts.s_qf_names[i]; 4578ac27a0ecSDave Kleikamp } 4579ac27a0ecSDave Kleikamp #endif 4580bbd6851aSAl Viro unlock_super(sb); 4581d4c402d9SCurt Wohlgemuth kfree(orig_data); 4582ac27a0ecSDave Kleikamp return err; 4583ac27a0ecSDave Kleikamp } 4584ac27a0ecSDave Kleikamp 4585f975d6bcSTheodore Ts'o /* 4586f975d6bcSTheodore Ts'o * Note: calculating the overhead so we can be compatible with 4587f975d6bcSTheodore Ts'o * historical BSD practice is quite difficult in the face of 4588f975d6bcSTheodore Ts'o * clusters/bigalloc. This is because multiple metadata blocks from 4589f975d6bcSTheodore Ts'o * different block group can end up in the same allocation cluster. 4590f975d6bcSTheodore Ts'o * Calculating the exact overhead in the face of clustered allocation 4591f975d6bcSTheodore Ts'o * requires either O(all block bitmaps) in memory or O(number of block 4592f975d6bcSTheodore Ts'o * groups**2) in time. We will still calculate the superblock for 4593f975d6bcSTheodore Ts'o * older file systems --- and if we come across with a bigalloc file 4594f975d6bcSTheodore Ts'o * system with zero in s_overhead_clusters the estimate will be close to 4595f975d6bcSTheodore Ts'o * correct especially for very large cluster sizes --- but for newer 4596f975d6bcSTheodore Ts'o * file systems, it's better to calculate this figure once at mkfs 4597f975d6bcSTheodore Ts'o * time, and store it in the superblock. If the superblock value is 4598f975d6bcSTheodore Ts'o * present (even for non-bigalloc file systems), we will use it. 4599f975d6bcSTheodore Ts'o */ 4600617ba13bSMingming Cao static int ext4_statfs(struct dentry *dentry, struct kstatfs *buf) 4601ac27a0ecSDave Kleikamp { 4602ac27a0ecSDave Kleikamp struct super_block *sb = dentry->d_sb; 4603617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 4604617ba13bSMingming Cao struct ext4_super_block *es = sbi->s_es; 4605f975d6bcSTheodore Ts'o struct ext4_group_desc *gdp; 4606960cc398SPekka Enberg u64 fsid; 4607d02a9391SKazuya Mio s64 bfree; 4608ac27a0ecSDave Kleikamp 46095e70030dSBadari Pulavarty if (test_opt(sb, MINIX_DF)) { 46105e70030dSBadari Pulavarty sbi->s_overhead_last = 0; 4611f975d6bcSTheodore Ts'o } else if (es->s_overhead_clusters) { 4612f975d6bcSTheodore Ts'o sbi->s_overhead_last = le32_to_cpu(es->s_overhead_clusters); 46136bc9feffSAneesh Kumar K.V } else if (sbi->s_blocks_last != ext4_blocks_count(es)) { 46148df9675fSTheodore Ts'o ext4_group_t i, ngroups = ext4_get_groups_count(sb); 46155e70030dSBadari Pulavarty ext4_fsblk_t overhead = 0; 4616ac27a0ecSDave Kleikamp 4617ac27a0ecSDave Kleikamp /* 46185e70030dSBadari Pulavarty * Compute the overhead (FS structures). This is constant 46195e70030dSBadari Pulavarty * for a given filesystem unless the number of block groups 46205e70030dSBadari Pulavarty * changes so we cache the previous value until it does. 4621ac27a0ecSDave Kleikamp */ 4622ac27a0ecSDave Kleikamp 4623ac27a0ecSDave Kleikamp /* 4624ac27a0ecSDave Kleikamp * All of the blocks before first_data_block are 4625ac27a0ecSDave Kleikamp * overhead 4626ac27a0ecSDave Kleikamp */ 4627f975d6bcSTheodore Ts'o overhead = EXT4_B2C(sbi, le32_to_cpu(es->s_first_data_block)); 4628ac27a0ecSDave Kleikamp 4629ac27a0ecSDave Kleikamp /* 4630f975d6bcSTheodore Ts'o * Add the overhead found in each block group 4631ac27a0ecSDave Kleikamp */ 4632ac27a0ecSDave Kleikamp for (i = 0; i < ngroups; i++) { 4633f975d6bcSTheodore Ts'o gdp = ext4_get_group_desc(sb, i, NULL); 4634f975d6bcSTheodore Ts'o overhead += ext4_num_overhead_clusters(sb, i, gdp); 4635ac27a0ecSDave Kleikamp cond_resched(); 4636ac27a0ecSDave Kleikamp } 46375e70030dSBadari Pulavarty sbi->s_overhead_last = overhead; 46385e70030dSBadari Pulavarty smp_wmb(); 46396bc9feffSAneesh Kumar K.V sbi->s_blocks_last = ext4_blocks_count(es); 4640ac27a0ecSDave Kleikamp } 4641ac27a0ecSDave Kleikamp 4642617ba13bSMingming Cao buf->f_type = EXT4_SUPER_MAGIC; 4643ac27a0ecSDave Kleikamp buf->f_bsize = sb->s_blocksize; 4644f975d6bcSTheodore Ts'o buf->f_blocks = (ext4_blocks_count(es) - 4645f975d6bcSTheodore Ts'o EXT4_C2B(sbi, sbi->s_overhead_last)); 464657042651STheodore Ts'o bfree = percpu_counter_sum_positive(&sbi->s_freeclusters_counter) - 464757042651STheodore Ts'o percpu_counter_sum_positive(&sbi->s_dirtyclusters_counter); 4648d02a9391SKazuya Mio /* prevent underflow in case that few free space is available */ 464957042651STheodore Ts'o buf->f_bfree = EXT4_C2B(sbi, max_t(s64, bfree, 0)); 4650bd81d8eeSLaurent Vivier buf->f_bavail = buf->f_bfree - ext4_r_blocks_count(es); 4651bd81d8eeSLaurent Vivier if (buf->f_bfree < ext4_r_blocks_count(es)) 4652ac27a0ecSDave Kleikamp buf->f_bavail = 0; 4653ac27a0ecSDave Kleikamp buf->f_files = le32_to_cpu(es->s_inodes_count); 465452d9f3b4SPeter Zijlstra buf->f_ffree = percpu_counter_sum_positive(&sbi->s_freeinodes_counter); 4655617ba13bSMingming Cao buf->f_namelen = EXT4_NAME_LEN; 4656960cc398SPekka Enberg fsid = le64_to_cpup((void *)es->s_uuid) ^ 4657960cc398SPekka Enberg le64_to_cpup((void *)es->s_uuid + sizeof(u64)); 4658960cc398SPekka Enberg buf->f_fsid.val[0] = fsid & 0xFFFFFFFFUL; 4659960cc398SPekka Enberg buf->f_fsid.val[1] = (fsid >> 32) & 0xFFFFFFFFUL; 46600b8e58a1SAndreas Dilger 4661ac27a0ecSDave Kleikamp return 0; 4662ac27a0ecSDave Kleikamp } 4663ac27a0ecSDave Kleikamp 46640b8e58a1SAndreas Dilger /* Helper function for writing quotas on sync - we need to start transaction 46650b8e58a1SAndreas Dilger * before quota file is locked for write. Otherwise the are possible deadlocks: 4666ac27a0ecSDave Kleikamp * Process 1 Process 2 4667617ba13bSMingming Cao * ext4_create() quota_sync() 4668dab291afSMingming Cao * jbd2_journal_start() write_dquot() 4669871a2931SChristoph Hellwig * dquot_initialize() down(dqio_mutex) 4670dab291afSMingming Cao * down(dqio_mutex) jbd2_journal_start() 4671ac27a0ecSDave Kleikamp * 4672ac27a0ecSDave Kleikamp */ 4673ac27a0ecSDave Kleikamp 4674ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 4675ac27a0ecSDave Kleikamp 4676ac27a0ecSDave Kleikamp static inline struct inode *dquot_to_inode(struct dquot *dquot) 4677ac27a0ecSDave Kleikamp { 4678ac27a0ecSDave Kleikamp return sb_dqopt(dquot->dq_sb)->files[dquot->dq_type]; 4679ac27a0ecSDave Kleikamp } 4680ac27a0ecSDave Kleikamp 4681617ba13bSMingming Cao static int ext4_write_dquot(struct dquot *dquot) 4682ac27a0ecSDave Kleikamp { 4683ac27a0ecSDave Kleikamp int ret, err; 4684ac27a0ecSDave Kleikamp handle_t *handle; 4685ac27a0ecSDave Kleikamp struct inode *inode; 4686ac27a0ecSDave Kleikamp 4687ac27a0ecSDave Kleikamp inode = dquot_to_inode(dquot); 4688617ba13bSMingming Cao handle = ext4_journal_start(inode, 4689617ba13bSMingming Cao EXT4_QUOTA_TRANS_BLOCKS(dquot->dq_sb)); 4690ac27a0ecSDave Kleikamp if (IS_ERR(handle)) 4691ac27a0ecSDave Kleikamp return PTR_ERR(handle); 4692ac27a0ecSDave Kleikamp ret = dquot_commit(dquot); 4693617ba13bSMingming Cao err = ext4_journal_stop(handle); 4694ac27a0ecSDave Kleikamp if (!ret) 4695ac27a0ecSDave Kleikamp ret = err; 4696ac27a0ecSDave Kleikamp return ret; 4697ac27a0ecSDave Kleikamp } 4698ac27a0ecSDave Kleikamp 4699617ba13bSMingming Cao static int ext4_acquire_dquot(struct dquot *dquot) 4700ac27a0ecSDave Kleikamp { 4701ac27a0ecSDave Kleikamp int ret, err; 4702ac27a0ecSDave Kleikamp handle_t *handle; 4703ac27a0ecSDave Kleikamp 4704617ba13bSMingming Cao handle = ext4_journal_start(dquot_to_inode(dquot), 4705617ba13bSMingming Cao EXT4_QUOTA_INIT_BLOCKS(dquot->dq_sb)); 4706ac27a0ecSDave Kleikamp if (IS_ERR(handle)) 4707ac27a0ecSDave Kleikamp return PTR_ERR(handle); 4708ac27a0ecSDave Kleikamp ret = dquot_acquire(dquot); 4709617ba13bSMingming Cao err = ext4_journal_stop(handle); 4710ac27a0ecSDave Kleikamp if (!ret) 4711ac27a0ecSDave Kleikamp ret = err; 4712ac27a0ecSDave Kleikamp return ret; 4713ac27a0ecSDave Kleikamp } 4714ac27a0ecSDave Kleikamp 4715617ba13bSMingming Cao static int ext4_release_dquot(struct dquot *dquot) 4716ac27a0ecSDave Kleikamp { 4717ac27a0ecSDave Kleikamp int ret, err; 4718ac27a0ecSDave Kleikamp handle_t *handle; 4719ac27a0ecSDave Kleikamp 4720617ba13bSMingming Cao handle = ext4_journal_start(dquot_to_inode(dquot), 4721617ba13bSMingming Cao EXT4_QUOTA_DEL_BLOCKS(dquot->dq_sb)); 47229c3013e9SJan Kara if (IS_ERR(handle)) { 47239c3013e9SJan Kara /* Release dquot anyway to avoid endless cycle in dqput() */ 47249c3013e9SJan Kara dquot_release(dquot); 4725ac27a0ecSDave Kleikamp return PTR_ERR(handle); 47269c3013e9SJan Kara } 4727ac27a0ecSDave Kleikamp ret = dquot_release(dquot); 4728617ba13bSMingming Cao err = ext4_journal_stop(handle); 4729ac27a0ecSDave Kleikamp if (!ret) 4730ac27a0ecSDave Kleikamp ret = err; 4731ac27a0ecSDave Kleikamp return ret; 4732ac27a0ecSDave Kleikamp } 4733ac27a0ecSDave Kleikamp 4734617ba13bSMingming Cao static int ext4_mark_dquot_dirty(struct dquot *dquot) 4735ac27a0ecSDave Kleikamp { 47362c8be6b2SJan Kara /* Are we journaling quotas? */ 4737617ba13bSMingming Cao if (EXT4_SB(dquot->dq_sb)->s_qf_names[USRQUOTA] || 4738617ba13bSMingming Cao EXT4_SB(dquot->dq_sb)->s_qf_names[GRPQUOTA]) { 4739ac27a0ecSDave Kleikamp dquot_mark_dquot_dirty(dquot); 4740617ba13bSMingming Cao return ext4_write_dquot(dquot); 4741ac27a0ecSDave Kleikamp } else { 4742ac27a0ecSDave Kleikamp return dquot_mark_dquot_dirty(dquot); 4743ac27a0ecSDave Kleikamp } 4744ac27a0ecSDave Kleikamp } 4745ac27a0ecSDave Kleikamp 4746617ba13bSMingming Cao static int ext4_write_info(struct super_block *sb, int type) 4747ac27a0ecSDave Kleikamp { 4748ac27a0ecSDave Kleikamp int ret, err; 4749ac27a0ecSDave Kleikamp handle_t *handle; 4750ac27a0ecSDave Kleikamp 4751ac27a0ecSDave Kleikamp /* Data block + inode block */ 4752617ba13bSMingming Cao handle = ext4_journal_start(sb->s_root->d_inode, 2); 4753ac27a0ecSDave Kleikamp if (IS_ERR(handle)) 4754ac27a0ecSDave Kleikamp return PTR_ERR(handle); 4755ac27a0ecSDave Kleikamp ret = dquot_commit_info(sb, type); 4756617ba13bSMingming Cao err = ext4_journal_stop(handle); 4757ac27a0ecSDave Kleikamp if (!ret) 4758ac27a0ecSDave Kleikamp ret = err; 4759ac27a0ecSDave Kleikamp return ret; 4760ac27a0ecSDave Kleikamp } 4761ac27a0ecSDave Kleikamp 4762ac27a0ecSDave Kleikamp /* 4763ac27a0ecSDave Kleikamp * Turn on quotas during mount time - we need to find 4764ac27a0ecSDave Kleikamp * the quota file and such... 4765ac27a0ecSDave Kleikamp */ 4766617ba13bSMingming Cao static int ext4_quota_on_mount(struct super_block *sb, int type) 4767ac27a0ecSDave Kleikamp { 4768287a8095SChristoph Hellwig return dquot_quota_on_mount(sb, EXT4_SB(sb)->s_qf_names[type], 4769617ba13bSMingming Cao EXT4_SB(sb)->s_jquota_fmt, type); 4770ac27a0ecSDave Kleikamp } 4771ac27a0ecSDave Kleikamp 4772ac27a0ecSDave Kleikamp /* 4773ac27a0ecSDave Kleikamp * Standard function to be called on quota_on 4774ac27a0ecSDave Kleikamp */ 4775617ba13bSMingming Cao static int ext4_quota_on(struct super_block *sb, int type, int format_id, 4776f00c9e44SJan Kara struct path *path) 4777ac27a0ecSDave Kleikamp { 4778ac27a0ecSDave Kleikamp int err; 4779ac27a0ecSDave Kleikamp 4780ac27a0ecSDave Kleikamp if (!test_opt(sb, QUOTA)) 4781ac27a0ecSDave Kleikamp return -EINVAL; 47820623543bSJan Kara 4783ac27a0ecSDave Kleikamp /* Quotafile not on the same filesystem? */ 4784*d8c9584eSAl Viro if (path->dentry->d_sb != sb) 4785ac27a0ecSDave Kleikamp return -EXDEV; 47860623543bSJan Kara /* Journaling quota? */ 47870623543bSJan Kara if (EXT4_SB(sb)->s_qf_names[type]) { 47882b2d6d01STheodore Ts'o /* Quotafile not in fs root? */ 4789f00c9e44SJan Kara if (path->dentry->d_parent != sb->s_root) 4790b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 4791b31e1552SEric Sandeen "Quota file not on filesystem root. " 4792b31e1552SEric Sandeen "Journaled quota will not work"); 47930623543bSJan Kara } 47940623543bSJan Kara 47950623543bSJan Kara /* 47960623543bSJan Kara * When we journal data on quota file, we have to flush journal to see 47970623543bSJan Kara * all updates to the file when we bypass pagecache... 47980623543bSJan Kara */ 47990390131bSFrank Mayhar if (EXT4_SB(sb)->s_journal && 4800f00c9e44SJan Kara ext4_should_journal_data(path->dentry->d_inode)) { 48010623543bSJan Kara /* 48020623543bSJan Kara * We don't need to lock updates but journal_flush() could 48030623543bSJan Kara * otherwise be livelocked... 48040623543bSJan Kara */ 48050623543bSJan Kara jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal); 48067ffe1ea8SHidehiro Kawai err = jbd2_journal_flush(EXT4_SB(sb)->s_journal); 48070623543bSJan Kara jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal); 4808f00c9e44SJan Kara if (err) 48097ffe1ea8SHidehiro Kawai return err; 48107ffe1ea8SHidehiro Kawai } 48110623543bSJan Kara 4812f00c9e44SJan Kara return dquot_quota_on(sb, type, format_id, path); 4813ac27a0ecSDave Kleikamp } 4814ac27a0ecSDave Kleikamp 4815ca0e05e4SDmitry Monakhov static int ext4_quota_off(struct super_block *sb, int type) 4816ca0e05e4SDmitry Monakhov { 481721f97697SJan Kara struct inode *inode = sb_dqopt(sb)->files[type]; 481821f97697SJan Kara handle_t *handle; 481921f97697SJan Kara 482087009d86SDmitry Monakhov /* Force all delayed allocation blocks to be allocated. 482187009d86SDmitry Monakhov * Caller already holds s_umount sem */ 482287009d86SDmitry Monakhov if (test_opt(sb, DELALLOC)) 4823ca0e05e4SDmitry Monakhov sync_filesystem(sb); 4824ca0e05e4SDmitry Monakhov 48250b268590SAmir Goldstein if (!inode) 48260b268590SAmir Goldstein goto out; 48270b268590SAmir Goldstein 482821f97697SJan Kara /* Update modification times of quota files when userspace can 482921f97697SJan Kara * start looking at them */ 483021f97697SJan Kara handle = ext4_journal_start(inode, 1); 483121f97697SJan Kara if (IS_ERR(handle)) 483221f97697SJan Kara goto out; 483321f97697SJan Kara inode->i_mtime = inode->i_ctime = CURRENT_TIME; 483421f97697SJan Kara ext4_mark_inode_dirty(handle, inode); 483521f97697SJan Kara ext4_journal_stop(handle); 483621f97697SJan Kara 483721f97697SJan Kara out: 4838ca0e05e4SDmitry Monakhov return dquot_quota_off(sb, type); 4839ca0e05e4SDmitry Monakhov } 4840ca0e05e4SDmitry Monakhov 4841ac27a0ecSDave Kleikamp /* Read data from quotafile - avoid pagecache and such because we cannot afford 4842ac27a0ecSDave Kleikamp * acquiring the locks... As quota files are never truncated and quota code 4843ac27a0ecSDave Kleikamp * itself serializes the operations (and no one else should touch the files) 4844ac27a0ecSDave Kleikamp * we don't have to be afraid of races */ 4845617ba13bSMingming Cao static ssize_t ext4_quota_read(struct super_block *sb, int type, char *data, 4846ac27a0ecSDave Kleikamp size_t len, loff_t off) 4847ac27a0ecSDave Kleikamp { 4848ac27a0ecSDave Kleikamp struct inode *inode = sb_dqopt(sb)->files[type]; 4849725d26d3SAneesh Kumar K.V ext4_lblk_t blk = off >> EXT4_BLOCK_SIZE_BITS(sb); 4850ac27a0ecSDave Kleikamp int err = 0; 4851ac27a0ecSDave Kleikamp int offset = off & (sb->s_blocksize - 1); 4852ac27a0ecSDave Kleikamp int tocopy; 4853ac27a0ecSDave Kleikamp size_t toread; 4854ac27a0ecSDave Kleikamp struct buffer_head *bh; 4855ac27a0ecSDave Kleikamp loff_t i_size = i_size_read(inode); 4856ac27a0ecSDave Kleikamp 4857ac27a0ecSDave Kleikamp if (off > i_size) 4858ac27a0ecSDave Kleikamp return 0; 4859ac27a0ecSDave Kleikamp if (off+len > i_size) 4860ac27a0ecSDave Kleikamp len = i_size-off; 4861ac27a0ecSDave Kleikamp toread = len; 4862ac27a0ecSDave Kleikamp while (toread > 0) { 4863ac27a0ecSDave Kleikamp tocopy = sb->s_blocksize - offset < toread ? 4864ac27a0ecSDave Kleikamp sb->s_blocksize - offset : toread; 4865617ba13bSMingming Cao bh = ext4_bread(NULL, inode, blk, 0, &err); 4866ac27a0ecSDave Kleikamp if (err) 4867ac27a0ecSDave Kleikamp return err; 4868ac27a0ecSDave Kleikamp if (!bh) /* A hole? */ 4869ac27a0ecSDave Kleikamp memset(data, 0, tocopy); 4870ac27a0ecSDave Kleikamp else 4871ac27a0ecSDave Kleikamp memcpy(data, bh->b_data+offset, tocopy); 4872ac27a0ecSDave Kleikamp brelse(bh); 4873ac27a0ecSDave Kleikamp offset = 0; 4874ac27a0ecSDave Kleikamp toread -= tocopy; 4875ac27a0ecSDave Kleikamp data += tocopy; 4876ac27a0ecSDave Kleikamp blk++; 4877ac27a0ecSDave Kleikamp } 4878ac27a0ecSDave Kleikamp return len; 4879ac27a0ecSDave Kleikamp } 4880ac27a0ecSDave Kleikamp 4881ac27a0ecSDave Kleikamp /* Write to quotafile (we know the transaction is already started and has 4882ac27a0ecSDave Kleikamp * enough credits) */ 4883617ba13bSMingming Cao static ssize_t ext4_quota_write(struct super_block *sb, int type, 4884ac27a0ecSDave Kleikamp const char *data, size_t len, loff_t off) 4885ac27a0ecSDave Kleikamp { 4886ac27a0ecSDave Kleikamp struct inode *inode = sb_dqopt(sb)->files[type]; 4887725d26d3SAneesh Kumar K.V ext4_lblk_t blk = off >> EXT4_BLOCK_SIZE_BITS(sb); 4888ac27a0ecSDave Kleikamp int err = 0; 4889ac27a0ecSDave Kleikamp int offset = off & (sb->s_blocksize - 1); 4890ac27a0ecSDave Kleikamp struct buffer_head *bh; 4891ac27a0ecSDave Kleikamp handle_t *handle = journal_current_handle(); 4892ac27a0ecSDave Kleikamp 48930390131bSFrank Mayhar if (EXT4_SB(sb)->s_journal && !handle) { 4894b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "Quota write (off=%llu, len=%llu)" 4895b31e1552SEric Sandeen " cancelled because transaction is not started", 48969c3013e9SJan Kara (unsigned long long)off, (unsigned long long)len); 48979c3013e9SJan Kara return -EIO; 48989c3013e9SJan Kara } 489967eeb568SDmitry Monakhov /* 490067eeb568SDmitry Monakhov * Since we account only one data block in transaction credits, 490167eeb568SDmitry Monakhov * then it is impossible to cross a block boundary. 490267eeb568SDmitry Monakhov */ 490367eeb568SDmitry Monakhov if (sb->s_blocksize - offset < len) { 490467eeb568SDmitry Monakhov ext4_msg(sb, KERN_WARNING, "Quota write (off=%llu, len=%llu)" 490567eeb568SDmitry Monakhov " cancelled because not block aligned", 490667eeb568SDmitry Monakhov (unsigned long long)off, (unsigned long long)len); 490767eeb568SDmitry Monakhov return -EIO; 490867eeb568SDmitry Monakhov } 490967eeb568SDmitry Monakhov 4910ac27a0ecSDave Kleikamp mutex_lock_nested(&inode->i_mutex, I_MUTEX_QUOTA); 4911617ba13bSMingming Cao bh = ext4_bread(handle, inode, blk, 1, &err); 4912ac27a0ecSDave Kleikamp if (!bh) 4913ac27a0ecSDave Kleikamp goto out; 4914617ba13bSMingming Cao err = ext4_journal_get_write_access(handle, bh); 4915ac27a0ecSDave Kleikamp if (err) { 4916ac27a0ecSDave Kleikamp brelse(bh); 4917ac27a0ecSDave Kleikamp goto out; 4918ac27a0ecSDave Kleikamp } 4919ac27a0ecSDave Kleikamp lock_buffer(bh); 492067eeb568SDmitry Monakhov memcpy(bh->b_data+offset, data, len); 4921ac27a0ecSDave Kleikamp flush_dcache_page(bh->b_page); 4922ac27a0ecSDave Kleikamp unlock_buffer(bh); 49230390131bSFrank Mayhar err = ext4_handle_dirty_metadata(handle, NULL, bh); 4924ac27a0ecSDave Kleikamp brelse(bh); 4925ac27a0ecSDave Kleikamp out: 492667eeb568SDmitry Monakhov if (err) { 49274d04e4fbSJan Kara mutex_unlock(&inode->i_mutex); 4928ac27a0ecSDave Kleikamp return err; 49294d04e4fbSJan Kara } 493067eeb568SDmitry Monakhov if (inode->i_size < off + len) { 493167eeb568SDmitry Monakhov i_size_write(inode, off + len); 4932617ba13bSMingming Cao EXT4_I(inode)->i_disksize = inode->i_size; 4933617ba13bSMingming Cao ext4_mark_inode_dirty(handle, inode); 493421f97697SJan Kara } 4935ac27a0ecSDave Kleikamp mutex_unlock(&inode->i_mutex); 493667eeb568SDmitry Monakhov return len; 4937ac27a0ecSDave Kleikamp } 4938ac27a0ecSDave Kleikamp 4939ac27a0ecSDave Kleikamp #endif 4940ac27a0ecSDave Kleikamp 4941152a0836SAl Viro static struct dentry *ext4_mount(struct file_system_type *fs_type, int flags, 4942152a0836SAl Viro const char *dev_name, void *data) 4943ac27a0ecSDave Kleikamp { 4944152a0836SAl Viro return mount_bdev(fs_type, flags, dev_name, data, ext4_fill_super); 4945ac27a0ecSDave Kleikamp } 4946ac27a0ecSDave Kleikamp 494737f328ebSTheodore Ts'o #if !defined(CONFIG_EXT2_FS) && !defined(CONFIG_EXT2_FS_MODULE) && defined(CONFIG_EXT4_USE_FOR_EXT23) 494824b58424STheodore Ts'o static inline void register_as_ext2(void) 494924b58424STheodore Ts'o { 495024b58424STheodore Ts'o int err = register_filesystem(&ext2_fs_type); 495124b58424STheodore Ts'o if (err) 495224b58424STheodore Ts'o printk(KERN_WARNING 495324b58424STheodore Ts'o "EXT4-fs: Unable to register as ext2 (%d)\n", err); 495424b58424STheodore Ts'o } 495524b58424STheodore Ts'o 495624b58424STheodore Ts'o static inline void unregister_as_ext2(void) 495724b58424STheodore Ts'o { 495824b58424STheodore Ts'o unregister_filesystem(&ext2_fs_type); 495924b58424STheodore Ts'o } 49602035e776STheodore Ts'o 49612035e776STheodore Ts'o static inline int ext2_feature_set_ok(struct super_block *sb) 49622035e776STheodore Ts'o { 49632035e776STheodore Ts'o if (EXT4_HAS_INCOMPAT_FEATURE(sb, ~EXT2_FEATURE_INCOMPAT_SUPP)) 49642035e776STheodore Ts'o return 0; 49652035e776STheodore Ts'o if (sb->s_flags & MS_RDONLY) 49662035e776STheodore Ts'o return 1; 49672035e776STheodore Ts'o if (EXT4_HAS_RO_COMPAT_FEATURE(sb, ~EXT2_FEATURE_RO_COMPAT_SUPP)) 49682035e776STheodore Ts'o return 0; 49692035e776STheodore Ts'o return 1; 49702035e776STheodore Ts'o } 497151b7e3c9STheodore Ts'o MODULE_ALIAS("ext2"); 497224b58424STheodore Ts'o #else 497324b58424STheodore Ts'o static inline void register_as_ext2(void) { } 497424b58424STheodore Ts'o static inline void unregister_as_ext2(void) { } 49752035e776STheodore Ts'o static inline int ext2_feature_set_ok(struct super_block *sb) { return 0; } 497624b58424STheodore Ts'o #endif 497724b58424STheodore Ts'o 497837f328ebSTheodore Ts'o #if !defined(CONFIG_EXT3_FS) && !defined(CONFIG_EXT3_FS_MODULE) && defined(CONFIG_EXT4_USE_FOR_EXT23) 497924b58424STheodore Ts'o static inline void register_as_ext3(void) 498024b58424STheodore Ts'o { 498124b58424STheodore Ts'o int err = register_filesystem(&ext3_fs_type); 498224b58424STheodore Ts'o if (err) 498324b58424STheodore Ts'o printk(KERN_WARNING 498424b58424STheodore Ts'o "EXT4-fs: Unable to register as ext3 (%d)\n", err); 498524b58424STheodore Ts'o } 498624b58424STheodore Ts'o 498724b58424STheodore Ts'o static inline void unregister_as_ext3(void) 498824b58424STheodore Ts'o { 498924b58424STheodore Ts'o unregister_filesystem(&ext3_fs_type); 499024b58424STheodore Ts'o } 49912035e776STheodore Ts'o 49922035e776STheodore Ts'o static inline int ext3_feature_set_ok(struct super_block *sb) 49932035e776STheodore Ts'o { 49942035e776STheodore Ts'o if (EXT4_HAS_INCOMPAT_FEATURE(sb, ~EXT3_FEATURE_INCOMPAT_SUPP)) 49952035e776STheodore Ts'o return 0; 49962035e776STheodore Ts'o if (!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)) 49972035e776STheodore Ts'o return 0; 49982035e776STheodore Ts'o if (sb->s_flags & MS_RDONLY) 49992035e776STheodore Ts'o return 1; 50002035e776STheodore Ts'o if (EXT4_HAS_RO_COMPAT_FEATURE(sb, ~EXT3_FEATURE_RO_COMPAT_SUPP)) 50012035e776STheodore Ts'o return 0; 50022035e776STheodore Ts'o return 1; 50032035e776STheodore Ts'o } 500451b7e3c9STheodore Ts'o MODULE_ALIAS("ext3"); 500524b58424STheodore Ts'o #else 500624b58424STheodore Ts'o static inline void register_as_ext3(void) { } 500724b58424STheodore Ts'o static inline void unregister_as_ext3(void) { } 50082035e776STheodore Ts'o static inline int ext3_feature_set_ok(struct super_block *sb) { return 0; } 500924b58424STheodore Ts'o #endif 501024b58424STheodore Ts'o 501103010a33STheodore Ts'o static struct file_system_type ext4_fs_type = { 5012ac27a0ecSDave Kleikamp .owner = THIS_MODULE, 501303010a33STheodore Ts'o .name = "ext4", 5014152a0836SAl Viro .mount = ext4_mount, 5015ac27a0ecSDave Kleikamp .kill_sb = kill_block_super, 5016ac27a0ecSDave Kleikamp .fs_flags = FS_REQUIRES_DEV, 5017ac27a0ecSDave Kleikamp }; 5018ac27a0ecSDave Kleikamp 50198f021222SLukas Czerner static int __init ext4_init_feat_adverts(void) 5020857ac889SLukas Czerner { 5021857ac889SLukas Czerner struct ext4_features *ef; 5022857ac889SLukas Czerner int ret = -ENOMEM; 5023857ac889SLukas Czerner 5024857ac889SLukas Czerner ef = kzalloc(sizeof(struct ext4_features), GFP_KERNEL); 5025857ac889SLukas Czerner if (!ef) 5026857ac889SLukas Czerner goto out; 5027857ac889SLukas Czerner 5028857ac889SLukas Czerner ef->f_kobj.kset = ext4_kset; 5029857ac889SLukas Czerner init_completion(&ef->f_kobj_unregister); 5030857ac889SLukas Czerner ret = kobject_init_and_add(&ef->f_kobj, &ext4_feat_ktype, NULL, 5031857ac889SLukas Czerner "features"); 5032857ac889SLukas Czerner if (ret) { 5033857ac889SLukas Czerner kfree(ef); 5034857ac889SLukas Czerner goto out; 5035857ac889SLukas Czerner } 5036857ac889SLukas Czerner 5037857ac889SLukas Czerner ext4_feat = ef; 5038857ac889SLukas Czerner ret = 0; 5039857ac889SLukas Czerner out: 5040857ac889SLukas Czerner return ret; 5041857ac889SLukas Czerner } 5042857ac889SLukas Czerner 50438f021222SLukas Czerner static void ext4_exit_feat_adverts(void) 50448f021222SLukas Czerner { 50458f021222SLukas Czerner kobject_put(&ext4_feat->f_kobj); 50468f021222SLukas Czerner wait_for_completion(&ext4_feat->f_kobj_unregister); 50478f021222SLukas Czerner kfree(ext4_feat); 50488f021222SLukas Czerner } 50498f021222SLukas Czerner 5050e9e3bcecSEric Sandeen /* Shared across all ext4 file systems */ 5051e9e3bcecSEric Sandeen wait_queue_head_t ext4__ioend_wq[EXT4_WQ_HASH_SZ]; 5052e9e3bcecSEric Sandeen struct mutex ext4__aio_mutex[EXT4_WQ_HASH_SZ]; 5053e9e3bcecSEric Sandeen 50545dabfc78STheodore Ts'o static int __init ext4_init_fs(void) 5055ac27a0ecSDave Kleikamp { 5056e9e3bcecSEric Sandeen int i, err; 5057c9de560dSAlex Tomas 505812e9b892SDmitry Monakhov ext4_check_flag_values(); 5059e9e3bcecSEric Sandeen 5060e9e3bcecSEric Sandeen for (i = 0; i < EXT4_WQ_HASH_SZ; i++) { 5061e9e3bcecSEric Sandeen mutex_init(&ext4__aio_mutex[i]); 5062e9e3bcecSEric Sandeen init_waitqueue_head(&ext4__ioend_wq[i]); 5063e9e3bcecSEric Sandeen } 5064e9e3bcecSEric Sandeen 50655dabfc78STheodore Ts'o err = ext4_init_pageio(); 50666fd058f7STheodore Ts'o if (err) 50676fd058f7STheodore Ts'o return err; 50685dabfc78STheodore Ts'o err = ext4_init_system_zone(); 5069bd2d0210STheodore Ts'o if (err) 5070d44651d0SFabrice Jouhaud goto out6; 50713197ebdbSTheodore Ts'o ext4_kset = kset_create_and_add("ext4", NULL, fs_kobj); 50723197ebdbSTheodore Ts'o if (!ext4_kset) 5073dd68314cSTheodore Ts'o goto out5; 5074d44651d0SFabrice Jouhaud ext4_proc_root = proc_mkdir("fs/ext4", NULL); 5075857ac889SLukas Czerner 5076857ac889SLukas Czerner err = ext4_init_feat_adverts(); 5077dd68314cSTheodore Ts'o if (err) 5078dd68314cSTheodore Ts'o goto out4; 5079857ac889SLukas Czerner 50805dabfc78STheodore Ts'o err = ext4_init_mballoc(); 5081ac27a0ecSDave Kleikamp if (err) 50826fd058f7STheodore Ts'o goto out3; 5083c9de560dSAlex Tomas 50845dabfc78STheodore Ts'o err = ext4_init_xattr(); 5085c9de560dSAlex Tomas if (err) 5086c9de560dSAlex Tomas goto out2; 5087ac27a0ecSDave Kleikamp err = init_inodecache(); 5088ac27a0ecSDave Kleikamp if (err) 5089ac27a0ecSDave Kleikamp goto out1; 509024b58424STheodore Ts'o register_as_ext3(); 50912035e776STheodore Ts'o register_as_ext2(); 509203010a33STheodore Ts'o err = register_filesystem(&ext4_fs_type); 5093ac27a0ecSDave Kleikamp if (err) 5094ac27a0ecSDave Kleikamp goto out; 5095bfff6873SLukas Czerner 5096bfff6873SLukas Czerner ext4_li_info = NULL; 5097bfff6873SLukas Czerner mutex_init(&ext4_li_mtx); 5098ac27a0ecSDave Kleikamp return 0; 5099ac27a0ecSDave Kleikamp out: 510024b58424STheodore Ts'o unregister_as_ext2(); 510124b58424STheodore Ts'o unregister_as_ext3(); 5102ac27a0ecSDave Kleikamp destroy_inodecache(); 5103ac27a0ecSDave Kleikamp out1: 51045dabfc78STheodore Ts'o ext4_exit_xattr(); 5105c9de560dSAlex Tomas out2: 51065dabfc78STheodore Ts'o ext4_exit_mballoc(); 51076fd058f7STheodore Ts'o out3: 51088f021222SLukas Czerner ext4_exit_feat_adverts(); 51096fd058f7STheodore Ts'o out4: 5110d44651d0SFabrice Jouhaud if (ext4_proc_root) 5111dd68314cSTheodore Ts'o remove_proc_entry("fs/ext4", NULL); 5112dd68314cSTheodore Ts'o kset_unregister(ext4_kset); 5113d44651d0SFabrice Jouhaud out5: 5114dd68314cSTheodore Ts'o ext4_exit_system_zone(); 5115d44651d0SFabrice Jouhaud out6: 51165dabfc78STheodore Ts'o ext4_exit_pageio(); 5117ac27a0ecSDave Kleikamp return err; 5118ac27a0ecSDave Kleikamp } 5119ac27a0ecSDave Kleikamp 51205dabfc78STheodore Ts'o static void __exit ext4_exit_fs(void) 5121ac27a0ecSDave Kleikamp { 5122bfff6873SLukas Czerner ext4_destroy_lazyinit_thread(); 512324b58424STheodore Ts'o unregister_as_ext2(); 512424b58424STheodore Ts'o unregister_as_ext3(); 512503010a33STheodore Ts'o unregister_filesystem(&ext4_fs_type); 5126ac27a0ecSDave Kleikamp destroy_inodecache(); 51275dabfc78STheodore Ts'o ext4_exit_xattr(); 51285dabfc78STheodore Ts'o ext4_exit_mballoc(); 51298f021222SLukas Czerner ext4_exit_feat_adverts(); 51309f6200bbSTheodore Ts'o remove_proc_entry("fs/ext4", NULL); 51313197ebdbSTheodore Ts'o kset_unregister(ext4_kset); 51325dabfc78STheodore Ts'o ext4_exit_system_zone(); 51335dabfc78STheodore Ts'o ext4_exit_pageio(); 5134ac27a0ecSDave Kleikamp } 5135ac27a0ecSDave Kleikamp 5136ac27a0ecSDave Kleikamp MODULE_AUTHOR("Remy Card, Stephen Tweedie, Andrew Morton, Andreas Dilger, Theodore Ts'o and others"); 513783982b6fSTheodore Ts'o MODULE_DESCRIPTION("Fourth Extended Filesystem"); 5138ac27a0ecSDave Kleikamp MODULE_LICENSE("GPL"); 51395dabfc78STheodore Ts'o module_init(ext4_init_fs) 51405dabfc78STheodore Ts'o module_exit(ext4_exit_fs) 5141